SU980263A1 - Sawtooth voltage generator - Google Patents

Description

(54-) POWER VOLTAGE GENERATOR

one

The invention relates to a g-pulse technique and is intended, for example, for use in technical diagnostics devices.

A generator of a sawtooth-shaped yarn is known, which contains a thyristor connected between the power supply bus and the capacitor, the control electrode of which is connected to the power source bus 13.

The disadvantage of the device is its low linearity of the voltage generated &

The closest in technical terms to the present invention is a sawtooth voltage generator containing a stabilizing transistor, the collector of which is connected to the first one. laying the capacitor, the base to the first output of the first resistor, the key transistor, the base of which is connected to the amvg of the compensating transistor, the emitter - to the first bus source

Here, the base of the compensating transistor is connected through the second resistor to the second seam power source, the transformer, the third resistor 2.

The disadvantages of the f device are low linearity and efficiency.

The purpose of the acquisition is to increase the linearity of the output voltage while increasing the efficiency of the device.

"ABOUT

The delivered shingles are achieved by the fact that in the sawtooth generator for example. nor, containing a stabilizing transistor, count, whose speaker is connected to the first capacitor plate, the base to

IS the first output of the first resistor, kl1Ochevoy traznstor, the base of which is coedii-. on with a compensating transistor emitter, an emitter - with the first busbar stand, the base of the compensating transistor

Claims (2)

20 The resistor is connected through a second resistor, to a second power supply bus, a transformer and a third resistor, a thrust resistor is inserted, the control electrode of which choree third resistor is connected to the secondary stabilizer and the second power supply bus, the anode to the first capacitor plate The first winding of the transformer is connected to the power supply bus and the thyristor cathode, the second winding of the transformer is wide-open between D2 (the second output of the first resistor and the switch of the key transistor, The drawing shows the electrical circuit diagram of the device. The device contains a stabilizing transistor 1, a capacitor 2, a first resistor 3, a key transistor 4, a compensating transistor 5, a second reistor 6, a power source 7, a transistor 8 , the third resistor 9, thyristor 1O The device operates as follows: After energization, the voltage on the capacitor 2 is zero (U O), and the voltage on about (the output of the transformer V U is equal to the source voltage food and (and and). The voltage on the thyrior 1O is equal to the voltage O. “Oh, the thyristor 1O is closed. Through the resistor 6, the base-emitter transition of the transistor 5, the base-transition of the transistor 4 passes the current, which leads to an open-ended transistor 1. The collector current t passes. The capacitor begins to charge with a current f penny: the winding of the transformer 8 is the internal resistance of the source 7 — intercept the emitter collector of the transistor 1 to its voltage Uj. The value of the charge current is close to constant, which is: cw: 1 with constant currents flowing through the collector-mitmitter junction of the resistors 1 and 4. Due to the fact that the current i is close to constant, the voltage on the capacitor 2 increases according to a law close to linear. If the current i of the capacitor oiw jTH4aeTcn is constant, then a voltage Uyp L ol-ij / cit arises on the winding of the transformer 8, where "1 is the inductance value of the primary winding of the transfo; Matora 8, which leads to the occurrence of voltage on another winding of the transformer, is proportional to the value. This voltage, VLIB: I am at the tOK base of the transistor 1, changes the charge current of the capacitor 2 in such a way as to reduce the value of olij / di. Thus, negative feedback is provided to the generator. As the voltage on the co-voltage 2 increases to the ignition voltage of the thyristor 4 "(3 thyristor 4 opens. When the thyristor 10 is open, the base of transistor 4 is closed by an open thyristor 10 on the emitter of transistor 4, which causes it to close, respectively When the transistor is opened, a colossal circuit is formed: capacitor 2 — winding transformer 8 — thyristor 1O. Tip of a high Q of the circuit. Capacitor .i 2 in this circuit is recharged with almost no energy loss. When the thyristor 1O is closed, the voltage on the capacitor 2 is equal to - Oz, i.e. Oc - Next, the capacitor 2 is recharged with the closed thyristor 1O as described above. Invention formula Geyerator sawtooth voltage containing stabilizing transistor, the collector of which is connected to the first capacitor plate, the base to the first terminal of the first resistor, the key transistor, the base of which is connected to the emitter to: the compensating transistor; emitter - with the first length of the pitasbg source, the base of the compensating transistor through the second resistor is connected to the second power source, a transformer and a third resistor, which is used to increase the output voltage at a single increasing the efficiency of your devices, a thyristor is inserted into it, the control electrode of which through a third resistor with the emitter of the stabilizing transistor and with the second bus of the power supply, the anode with the first capacitor plate, The first winding of the transformer is connected to the first power supply source and the thyristor cathode, the second transformer is connected between the second output of the first resistor and the collector of the key transistor, and the stabilizing and 5660263 " compensating transistors obedin -1. Devices and equipment vksp rvmeita, y.1977, №4, p. 151, fig. one. Information sources, 2. USSR author's certificate taken into account in case of expert no 40OO13, cl. H 03 K 4 / 5O, 1971.