JPH0441607Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to an electronic frequency divider.

BACKGROUND ART An example of a conventional frequency divider is one shown in FIG. 3 that utilizes the parametron principle.
In this Fig. 3, the signal wave shown in Fig. 4a is input to the input terminal Vin, is half-wave rectified by the silicon rectifier D, and DC bias is applied to the iron cores 1 and 2. The inductance of the winding is changed by passing a current Iin shown in FIG. 4b through the coil. By connecting the primary windings 5 and 6 in reverse, the transformer action on the output winding 4 is suppressed, and the output is terminal
From Vout, we obtain a 1/2 fractional harmonic as shown in Figure 4c.

Problems to be Solved by the Invention However, since this conventional frequency divider divides the frequency of the input signal wave only using a parametron transformer, the transformer mechanism has to be large.
Due to its oscillation principle, a large input current must flow, so it is inefficient. Furthermore, since the power supply current is half-wave rectified, there is also the problem that the DC component has an adverse effect on the power supply.

Therefore, the object of this invention is to solve the above-mentioned conventional problems and provide an electronic frequency divider that requires less input current, is highly efficient, and is lightweight and compact.

Means for solving the problem In order to achieve the above purpose, this invention
As shown in the figure, a primary winding 81 on the input side of a parametron transformer ₉ outputs a half frequency synchronous with the frequency of the input signal to a tertiary winding 8 on the output side of the signal input transformer T1, 82 is connected. A first waveform shaping circuit 112 and a second waveform shaping circuit are connected to the secondary winding 10 on the output side of the parametron transformer 9 for shaping each output of the parametron transformer 9 into a square wave.
A first field effect transistor 121 and a second field effect transistor 122 are configured to be alternately conductive by the waveform shaping circuit 113 and the square wave outputs of the first waveform shaping circuit and the second waveform shaping circuit.
and an output transformer _T2 , one end 132 of the primary winding 13 of the output transformer is connected to the first field effect transistor, and one output winding of the secondary winding of the parametron transformer is connected via the first waveform shaping circuit. wire 101 and the other end 131 of the primary winding 13
are connected in series so as to be connected to the other output winding 102 of the secondary winding of the parametron transformer via the second field effect transistor and the second waveform shaping circuit.

Further, a DC power supply circuit 16 having a rectifier Rec in the secondary winding 15 on the output side of the signal input transformer _T1
and connect the negative side of the rectifier of this DC power supply circuit to the intermediate point 123 connecting the first field effect transistor and the second field effect transistor, and further to the neutral point 103 provided in the secondary winding 10 of the parametron transformer. At the same time, the positive side is connected to the neutral point 133 of the primary winding of the output transformer _T2 .

Function and Examples In FIG. 1, 7 is the input winding of the signal input transformer _T1 connected to the signal wave input terminal Vin.
The parametron transformer 9 is of a small size and has the same configuration as that shown in FIG. The DC power supply circuit 16 includes a rectifier Rec connected to the secondary winding 15 on the output side of the signal input transformer _T1 , and a capacitor inserted between the positive and negative sides of the rectifier.
It is composed of _C1 . This DC power supply circuit 16
The negative side of is connected to a midpoint 123 of a line connecting the source sides of field effect transistors 121 and 122 via a neutral wire 111, and further to a neutral point 103 of the secondary winding 10 of the parametron transformer 9.
The positive side of the DC power supply circuit 16 is the output transformer T ₂
is connected to the neutral point 133 of the primary winding 13 of.

The waveform shaping circuit 11 connects the first
It is divided into a waveform shaping circuit 112 and a second waveform shaping circuit 113.

Output winding 10 in first waveform shaping circuit 112
A resistor R ₂ is inserted into the output winding 102 of the second waveform shaping circuit 113 , and a resistor R ₃ is inserted into the output winding 102 of the second waveform shaping circuit 113 . A predetermined point on the line connecting the resistor R ₂ and the gate side of the field effect transistor 121 and a predetermined point on the neutral wire 111, and a line connecting the predetermined point on the neutral wire 111 and the resistor R ₃ on the gate side of the field effect transistor 122. Zener diodes ZD ₁ and ZD ₂ are inserted between the predetermined points and resistors R ₂ and R ₃ , respectively. The forward diode D 2 is closer to the secondary winding ₁₀ than the Zener diodes ZD ₁ , ZD ₂ with respect to the anode side of the Zener diodes ZD ₁ , ZD ₂ and the neutral point 103 of the secondary winding 10 of the parametron transformer 9 . It is inserted into the sex line 111.

The first waveform shaping circuit 112 is connected to a field effect transistor 121 , and the second waveform shaping circuit 113 is connected to a field effect transistor 122 .

12 is a switching amplifier circuit, and this switching amplifier circuit 12 is a field effect transistor 1.
21, 122, and both transistors 121, 1
A snubber circuit is formed by a resistor R ₄ and a capacitor C ₃ connected in series between 22 and 22. The drain side of the field effect transistor 121 is an output transformer.
At one end 132 of the primary winding 13 of T ₂ , the drain side of the field effect transistor 122 is connected to the other end 131 of the primary winding 13 of the output transformer T ₂ .

In addition, 14 is an output winding connected to the output terminal Vout, 83 is a secondary winding for resonance in the parametron transformer 9, C ₂ is a resonance capacitor, D ₁ is a diode, and in the DC power supply circuit 16
R ₁ is the resistance.

In the above configuration, a signal wave having a waveform as shown in FIG. 2a is transmitted from the input terminal Vin to the input winding 7.
When the signal wave is input to the tertiary winding ₈ of the signal input transformer _T1 through By periodically passing current around the saturation point, the inductance of the winding changes. Since the primary windings 81 and 82 of the parametron transformer 9 are connected in reverse, the transformer action on the secondary winding 10 on the output side is suppressed, and the inductance and resonance of the secondary winding 83 of the parametron transformer 9 are suppressed. A 1/2 fractional harmonic is output to the secondary winding 10 on the output side due to the 1/2 fractional wave resonance caused by the capacitor C ₂ . Thereby, the output windings 101, 102
With reference to the neutral wire 111, the output winding 101 outputs inverted frequency-divided waves as shown in FIG. 2b, and the output winding 102 outputs inverted frequency-divided waves as shown in FIG. 2c.

The frequency-divided waves output from the output windings 101 and 102 are waveform-shaped by a first waveform shaping circuit 112 and a second waveform shaping circuit 113, respectively, to become square waves as shown in FIG. 2d and e.

The square waves output from the first waveform shaping circuit 112 and the second waveform shaping circuit 113 are output to the gates of field effect transistors 121 and 122, respectively, but the phases of the two square waves are inverted with respect to the neutral line 111. Therefore, field effect transistor 1
21 and 122 are alternately conductive, and the DC power supply circuit 16
through the output transformer T ₂ and its primary winding 13
Direct current flows alternately on each side with a period of 1/2 fractional wave to the neutral point 133, and the output winding 14 side has a second
A 1/2 fractional wave AC output as shown in Figure f is output.

As mentioned above, the field effect transistor 121,1
22 are connected in a push-pull manner and are configured to be made conductive alternately by a square wave input, so that the current input can be kept as small as possible. In this way, a frequency-divided square wave as shown in FIG. 2f, which is synchronous with the signal wave, can be output.

Effects of the invention Since this invention has the above-mentioned configuration, it has the following effects.

A parametron transformer is used, but instead of dividing the frequency by it like a conventional frequency divider, the parametron transformer is used only as an oscillation source, and a neutral point is provided on the output side of the parametron transformer. Since the frequency division is performed by shaping the frequency divided waves whose phases are inverted to each other based on a point into a square wave, and directly driving the first and second field effect transistors by switching the square waves, the input current is The amount of energy required can be reduced, improving efficiency and making it possible to reduce the weight and size of the entire device.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an embodiment of this invention, Fig. 2 a to f are waveform diagrams showing the output waveforms of each component in Fig. 1, and Fig. 3 is a circuit showing a conventional frequency divider. Figures 4a to 4c are waveform diagrams thereof. 7...Input winding, 8...Signal input transformer 3
Next winding, 9... Parametron transformer, 12...
Switching amplifier circuit, 13... Primary winding of output transformer, 15... Secondary winding of signal input transformer, 16... DC power supply circuit, 112... First waveform shaping circuit, 113... Second waveform shaping circuit, 121
...first field effect transistor, 122...second
Field effect transistor, Rec... Rectifier.

Claims (1)

[Claims for Utility Model Registration] A primary winding on the input side of a parametron transformer ₉ that outputs a half frequency synchronous with the frequency of the input signal to a tertiary winding 8 on the output side of the signal input transformer T1. A first waveform shaping circuit 112 and a second waveform shaping circuit 113 which connect the lines 81 and 82 and shape the respective outputs of the parametron transformer 9 into square waves to the secondary winding 10 on the output side of the parametron transformer 9; The first field effect transistor 121 and the second field effect transistor 122, which are configured to be alternately conductive by the square wave outputs of the first waveform shaping circuit and the second waveform shaping circuit, and the output transformer _T2 are output. One end 132 of the primary winding 13 of the transformer is connected to one output winding 101 of the secondary winding of the parametron transformer via a first field effect transistor and a first waveform shaping circuit, and The other end 131 of the wire 13 is connected in series so that it is connected to the other output winding 102 of the secondary winding of the parametron transformer via a second field effect transistor and a second waveform shaping circuit, and DC power supply circuit 16 having a rectifier Rec in the secondary winding 15 on the output side of the signal input transformer T ₁
and connect the negative side of the rectifier of this DC power supply circuit to the intermediate point 123 connecting the first field effect transistor and the second field effect transistor, and further to the neutral point 103 provided in the secondary winding 10 of the parametron transformer. An electronic frequency divider characterized in that the positive side is connected to the neutral point 133 of the primary winding of the output transformer _T2 .