SU414736A1 - KEY DEVICE WITH CAPITAL CONTROL \ - Google Patents

Description

one

This invention relates to a technique for processing information. The device can be used in automation and telemechanics, in particular for the processing of a signal that changes the phase by 180 ° C in time.

Known key device with capacitive control lo aut. St. No. 290445, containing a key element, a source of control voltage, and a control circuit.

However, with such a circuit, with an input signal that changes the phase by 180 ° C in time, the output signal has a negative polarity (or positive polarity) When using pnp transistors). This is explained by the fact that the charging diode of the control voltage source connected to the collector is of a running type; the key element of the key element shunts the signal of the negative (positive) polarity by the magnitude of the diode, which is equal to -0.5 in.

The purpose of the invention is to expand the functionality of the key device and increase the amplitude of the output signal of negative polarity (or positive polarity when using p-anz-type transistors).

In the proposed key device, this slit is achieved by introducing a voltage source connected in parallel to the power supply, formed by a resistor and a zener diode, which is generally connected to the anode (or cathode using a transistor N type pnp) diode, to the key the cathode (anode) to the collectors of the transistors of the key element.

Scheme of the key device shown in the drawing.

The device contains a key element /, a source of control voltage 2 and a control circuit 3.

The collector of the transistor 4 is connected to the base of the transistor 5 and to the cathode (or the anode anode using transistors of the tin pnp) diode 6.

E.mitter of the transistor 5 and the anode (cathode) of diode 6 through; 1a, to: a portable capacitor 7 connected to an amn resistor 8, 9 and the cathode (anode) of diode 10, the anode (cathode) of which is connected to the switch m key 11, to the cathode (aiode) of the diode 12 and to the collector of the transistor 13. The emitter of the latter is connected through a resistor 14 to the collector of the anzistor 5.

A common point of Zener diode 15 and resistor 16 connected in parallel with the power supply with clamp 17 is connected to the anode (cathode, m) of diode 12. Resistor 18 is connected to a parallel-accumulating capacitor 7.

When a large control voltage is turned on, transistor 4 of the control circuit 3 opens, and starts for a number of storage capacitor 7 but a circuit: a stub: 1/5 diode, diodes 12 and 10, capacitor 7, diode 6, the transistor 4 and the source terminal 17. At the same time, the hope of the voltage on the diode 6 locks the key //,, and the key device does not reciepe to the conductive state.

The voltage / voltage across the diode 6 supports an additional transistor 5, which is eapert. This makes it possible to keep the transistor, p 13 in a closed state. The resistor 18 serves to maintain a small current in the diode 6 after charging the welding capacitor 7.

The described quasi-stable state is preserved until the control voltage level changes.

When the lysky control unit is turned on, the transistor 4 in the control circuit 3 is closed, and the key element I is isolated from the control circuit 3 and the terminal cell connected to the terminal 17.

After the closing of the transistor 4, the discharge of the capacitor 7 across the circuit begins: capacitor 7, resistor 8 and in parallel through resistor 9, switch 11, transistor 13, source 14, transistor 5, capacitor 7. Then the cycle repeats.

Prevention of Invention

Key device with capacitive control aut. St. 290445, characterized in that, in order to expand the functionality and increase the output signal amplitude, a voltage divider formed by a resistor and a zener diode connected in parallel to the ginner is inserted into it, and the common result of the a and zener diode is connected to the anode of the diode, connected to the cathode to the collectors of the transistors of the key element.

entrance

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