JPH03289802A - Electronic circuit - Google Patents

Abstract

PURPOSE:To reduce current consumption and to attain low current consumption by connecting the power supply line of a 1st electronic circuit and the power supply line of a 2nd electronic circuit in series with the power supply to operate both the electronic circuits with a common DC current. CONSTITUTION:A current 10 supplied to an electronic circuit 2 from a power supply 2 to a nonlinear resistive element 4 by the connection of power supply lines 1x, 1y, 2x, 2y is fed to an electronic circuit 1 through a route of electronic circuit 2 power supply line 2y nonlinear resistive element 5 power supply line 1x. Thus, the supplied current 11 goes to equal to the said current 10. That is, both the electronic circuits 1, 2 are driven by a common DC current. As a result, the current consumption is decreased almost to a half in comparison with the case of supplying a DC current in parallel to each electronic circuit.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electronic circuit having a circuit configuration that enables low current consumption operation, and particularly for use in receivers such as mobile phones that require low current consumption operation. The present invention relates to an electronic circuit suitable for a reception front-end circuit consisting of a low-noise amplifier and a frequency converter.

[Prior Art] The configuration of a conventional general electronic circuit is shown in the block diagram of FIG. In the configuration of this conventional electronic circuit, 101.
102 is two independent electronic circuits, +03 is a power supply,
104 is a current line that supplies current from the power supply +03 to each electronic circuit 101, 102, 105 is an input terminal of electronic circuit 101, 106 is an output terminal of electronic circuit 1, +07 is an input terminal of electronic circuit 2, and 108 is an electronic circuit This is the second output terminal.

In the above, each electronic circuit 101.102 has a current line 1
DC current 109110 is supplied in parallel from the power supply 103 through 04 to drive the input terminals 105 and 1.
From 07, the RF multiplied signal is manually output to output terminals 106 and 10.
8 to generate respective output signals. Input/output terminal 106,
+ +07 may be connected depending on the purpose.

An example of such an electronic circuit is a reception front end circuit. FIG. 4 is a block diagram showing a conventional example of the receiving front end circuit.

In the configuration of this reception front-end circuit, 111 is a low noise amplifier and corresponds to the above electronic circuit +01;
12 is a frequency converter, which corresponds to the electronic circuit 102 described above. The other elements of this embodiment are similar to the elements shown in FIG. 3 with the same reference numerals. In this embodiment, the output terminal +06 of the low noise amplifier III is connected to the input terminal 107 of the frequency converter 112, and as in the case of FIG.
DC currents 109 and 110 are supplied in parallel from 03 to drive the RF multiplied signal received from the input terminal 105, and an IF multiplied signal is generated at the output terminal 108.

Note that a filter for removing out-of-band signals may be inserted between the input and output terminals 106 and 10.7 depending on the purpose.

[Problem to be solved by the invention] However, in the electronic circuit in the above-mentioned conventional technology,
In either case of FIG. 3 or FIG. 4, each electronic circuit 101
．． 102 (or 111, 112) requires separate DC currents 109 and 110 for driving, so the current flowing through the entire electronic circuit is limited to both circuits 101, 102 (or 1
11.112), which is the sum of the currents 109 and 110, which poses a problem in that the current consumption is large. For this reason, when applied to mobile phones and the like that use batteries as a power source, the usable time is shortened, making it difficult to realize a device that can be used for a long time.

The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to provide an electronic circuit with low current consumption, which is particularly suitable for reception front-end circuits and the like.

[Means for Solving the Problems] The configuration of an electronic circuit of the present invention for achieving the above object includes a first electronic circuit and a second electronic circuit, and a power source for the first electronic circuit. A positive side of the line is connected to a power source via a first nonlinear element having high resistance and low voltage characteristics at high frequencies, and a positive side of the power line of the first electronic circuit is connected to a power source having high resistance and low voltage characteristics at high frequencies. It is characterized in that it is connected to the negative electrode side of the power supply line of the first electronic circuit via a second nonlinear element having voltage characteristics.

[Operation j] The present invention connects the power line of the first electronic circuit and the power line of the second electronic circuit in series with the power supply, thereby operating both electronic circuits with a common DC current. By doing so, the current consumption can be reduced to approximately 1/2 or less compared to when direct current is supplied in parallel as in the conventional case, thereby achieving low current consumption. At this time, the first electronic circuit and the second electronic circuit are separated at high frequency by inserting a nonlinear element having high resistance and low voltage drop characteristics at high frequency into the positive electrode side of each electronic circuit. and ensure that the operation of one electronic circuit does not adversely affect the operation of the other electronic circuit.
Enable each electronic circuit to operate well.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing a basic embodiment of the present invention. In the configuration of this embodiment, ■ is one electronic circuit,
Another electronic circuit, IX is the power line on the positive side of electronic circuit 1, 1y is the power line on the negative side of electronic circuit 1, 2X is the power line on the positive side of electronic circuit 2, and 2y is the negative side of electronic circuit 2. side power supply line, 3 is a power supply, 4.5 is a nonlinear resistance element having high resistance and low voltage drop characteristics at high frequencies such as the carrier frequency band, 6 is an input terminal of the electronic circuit 1, 7 is an output terminal of the electronic circuit 1, 8 is an input terminal of the electronic circuit 2, 9 is an output terminal of the electronic circuit 2, IO is a current supplied from the power supply 3, and 11 is a current flowing through the power supply line 2b.

In the connection of the above configuration, the power line 2x on the positive side of the electronic circuit 2 is connected to the power source 3 through the nonlinear resistance element 4, and the power line lx on the positive side of the electronic circuit l is connected to the negative side of the electronic circuit 2 through the nonlinear resistance element 5. The negative electrode side power line ly of the electronic circuit 1 is connected to the circuit ground. Depending on the application, the output terminal 7 of the electronic circuit I may be
It is connected to the input terminal 8 of the electronic circuit 2.

The operation and effect of the first embodiment configured as above will be described.

By connecting the power lines lx, Iy, 2x, and 2y above,
A current IO supplied from the power supply 3 to the electronic circuit 2 through the nonlinear resistance element 4 is supplied to the electronic circuit 1 through the electronic circuit 2 - power line 2y - nonlinear resistance element 5 - power line IX. Therefore, the supply current 11 is equal to the current IO. That is, in this embodiment, both electronic circuits 1.2
are driven by a common DC current. As a result, the current consumption can be reduced to approximately I/2 compared to the case where direct current is supplied to each electronic circuit in parallel, as shown in the conventional example of FIG. At this time, since the nonlinear resistance element 4.5 inserted into the positive electrode side of each electronic circuit 1.2 has characteristics of high resistance and low voltage drop at high frequencies, the two electronic circuits 1.
．． 2 are separated in terms of high frequency, the operation of one electronic circuit 1 (or 2) does not affect the operation of the other electronic circuit 2 (or l), and each electronic circuit 1, 2 operates well. I can do it.

FIG. 2 is a circuit diagram showing a second embodiment of the invention.

This embodiment shows an example in which the present invention is applied to a reception front-end circuit, and basically has a configuration corresponding to the first embodiment.

That is, this embodiment also includes an electronic circuit 1 and an electronic circuit 2,
The positive side (2x) of the power line of the electronic circuit 2 is connected to the power source 3 through the nonlinear resistance element 4, and the positive side (IX) of the power line of the electronic circuit l is connected to the negative side of the power line of the electronic circuit 2 through the nonlinear resistance element 5. It is connected to the side (2y). In this embodiment, the electronic circuit 1 is a low noise amplifier, and the electronic circuit 2
is a frequency converter.

The low noise amplifier l is a field effect transistor (hereinafter FE).
Ia (denoted as T) is used as a source-grounded FET, and the RF multiplied signal is input to its input terminal, the gate terminal 6, via the circuit's distributed constant circuit or matching circuit, and from the output terminal, the train terminal 7, to the circuit's matching circuit. It is configured to output an RF multiplied signal via the RF signal.

Next, the frequency converter 2 includes a pair of FETs 2a and 2b, and a pair of FETs 2a and 2b.
A pair of FET2c and 2d connected to ET2a, and a FET
A pair of FETs 2e and 2f connected to FET 2b, and FETs 2g and 2h whose outputs connect FETs 2c and 2e of these circuits and outputs that connect FETs 2d and 2f are connected to each gate terminal.
The gate terminals of FETs 2a and 2b are connected to RF
As input terminals 8, RF multiplied signals having mutually opposite phases are input to each of the gate terminals, and pairs of gate terminals of FETs 2c and 2f and gate terminals of FETs 2d and 2e are used as local oscillation input terminals 12. A local oscillation signal having a phase opposite to each other is inputted to each pair of gate terminals of the circuit, and an IF multiplied signal obtained by converting the frequency of the RF multiplied signal from the local oscillation signal is connected to the output of the pair of FET2g and FET2h. It is configured to output from a pair of IP output terminals 9.

In the above, the drain terminal side of the low noise amplifier l is F
Connected to the source terminals of the pair of FETs 2a and 2b through ET5a, and connected to the source terminals of FETs 2g and 2h through FET5b.
is connected to the source terminal of the pair. These FET5a,
5b constitutes the nonlinear resistance element 5. Also, FE
The train terminals of T2c and 2e pass through FET4a and connect to the FE
The train terminal of T2d2f passes through FET4b, and the FET
The train terminal of FET 2g is connected to the power supply 3 through FET 4c, and the train terminal of FET 2h is connected to power supply 3 through FET 4d. These FETs 4a4b, 4c, 4d are
It constitutes a nonlinear resistance element 4.

The operation and effect of the second embodiment configured as above will be explained.

In the above circuit configuration, the low noise amplifier 1 and frequency converter 2 are connected through FETs 5a and 5b, so when this circuit is driven by the power supply 3, the DC current of the frequency converter 2 is flows into the FET Ia that constitutes the low-noise amplifier l. Therefore, the direct current of the low noise amplifier 1 and the frequency converter 2 is shared, making it possible to reduce current consumption. On the other hand, FET5a,
Since the FET 5b acts as an extremely large resistance in terms of high frequency, it operates as a nonlinear resistance element, and the low noise amplifier 1 and frequency converter 2 are separated in terms of high frequency, so that their RF multiplied signals do not affect each other. Furthermore, the circuit of this embodiment is constructed entirely of FETs suitable for low voltage operation, and the voltage drop of each FET can be set to a low voltage of IV or less. Further, in the circuit of this embodiment, since the PET is stacked in five stages vertically, the power supply voltage can be used at 5 V or less, and it is fully possible to use a battery as the power supply 3. From the above, the reception front end circuit according to this embodiment has a 5V power supply 3 that can be operated by a battery.
Since the DC current is common to the low noise amplifier 1 and the frequency converter 2, the current can be lower than before, and in terms of high frequencies, the low noise amplifier 1 and the frequency converter 2 have no influence. It has the characteristic of having high frequency performance equivalent to conventional circuits without affecting each other.

Note that in the first embodiment, it is clear that the positions of the electronic circuits 1 and 2 may be interchanged; in that case, the signal is input to the electronic circuit closer to the power supply 3 side, and the electronic circuit closer to the ground side is inputted. Output can be made from the circuit. Further, as shown in the second embodiment, each nonlinear resistance element may be composed of a plurality of elements depending on the circuit configuration of each electronic circuit portion.

Furthermore, it is obvious that the present invention can be applied to other circuits other than the reception front-end circuit described above. As described above, the present invention can be applied in various ways in accordance with the spirit thereof, and can be implemented in various ways.

[Effects of the Invention] As is clear from the above explanation, the electronic circuit of the present invention allows for significantly lower current consumption compared to the conventional one, and is particularly suitable for use with batteries in receiver applications of wireless devices. The advantage is that it facilitates the long-term use of a circuit for a mobile phone as a power source.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention;
FIG. 3 is a block diagram showing a second embodiment of the present invention, FIG. 3 is a block diagram showing a general conventional example, and FIG. 4 is a block diagram showing a conventional example of a reception front-end circuit. 1.2...Electronic circuit, lx, Iy, 2x, 2y・Power line, 3 Power supply, 4 5・Nonlinear resistance element. Figure 1

Claims (1)

[Claims] (1) A first nonlinear element having a first electronic circuit and a second electronic circuit, and having high resistance and low voltage characteristics at high frequencies on the positive electrode side of the power supply line of the first electronic circuit. The positive electrode side of the power supply line of the first electronic circuit is connected to the power supply through the second nonlinear element, which has high resistance and low voltage characteristics at high frequencies. An electronic circuit characterized by being connected to the negative electrode side.