SU754653A1 - Rc-generator - Google Patents

Description

The invention relates to a pulse technique, in particular to a pulse generator, can be used, for example, in the nodes of telemetry equipment with frequency channel sealing "· 5

Known KC-generator, containing frequency-setting resistors and capacitors, amplitude-setting elements, operational amplifier [1],

With this generator, the parameters of the operational amplifier affect the generation frequency. In addition, temperature fluctuations affect the frequency of the generator.

Closest to the proposed 15 KS generator, containing an operational amplifier, a phase-shifting circuit consisting of two capacitors, the first plates of which are combined and connected to a common bus, the first resistor connected in parallel with the first capacitor and the second capacitor of the second capacitor connected to one the output of the second resistor [2].

This generator has the same Nedrstat-25

ki

The purpose of the invention is to increase the temperature stability of the frequency and reduce the influence of the parameters of active elements on the generation frequency.

2

For this purpose, a QC generator containing an operational amplifier, a phase-shifting circuit consisting of two capacitors, the first plates of which are combined and connected to the common bus, with the first resistor connected in parallel with the first capacitor and the second capacitor of the second capacitor connected to one output of the second resistor three resistors, an amplifier with automatic gain control and a current source on the second operational amplifier, the second lining of the first capacitor being connected via the third resistor to the second one second capacitor through the fourth resistor connected to the inverting input of the first operational amplifier, the second output of the second resistor through the fifth resistor connected to the common bus and directly to the non-inverting input of the first operational amplifier, the output of the first operational amplifier connected to the input of the amplifier with an automatic gain control, the output of which is connected to the input of the current source on the second operational amplifier, ne3

754653

four

the inverting input of which is connected to the second plate of the first capacitor, and the output to the input of Depi automatic gain control.

The drawing shows a diagram of the generator.

1, the sun-generator contains resistors $

1-5, capacitors b and 7, operational-. Amplifier 8, an amplifier 9 with automatic gain control and a current source 10 on the operational amplifier 11, the output of which is connected to the input of the automatic gain control circuit of the amplifier 9, the output of which is connected to the inverting input of the amplifier 11, the non-inverting input of which is connected to the inverting the input of the amplifier 8 through the resistor 3, ac common bus through connected in parallel resistor 1, capacitor 6 and the integrating circuit of the resistor 2 and the capacitor 7, the output 20 of which through a resistor 4 is connected to a non-inverting input m amplifier 8 connected to the common bus 5, a resistor, and the output of amplifier 8 is connected to the non-inverting input of the amplifier 9. 25

The phase-changing KS-chain is formed by resistors 1.2 and 6.7 capacitors. A voltage-controlled current generator with automatic adjustment of the transmission coefficient is made on usi-_ wheels 8 - 11. With the same rating of resistors 1 and 2 and capacitors 6 and 7, the generation frequency of such a device is determined by

_ -! - _{5 and the} condition arose - 35

21GKS

generation is determined by the expression

K - -3—, 40

TO

where K is the transmission coefficient of the voltage-controlled current generator, K =. ϊ · Μ. 45

and i

K is the resistance of the resistor 1 of the phase-converting chain;

C is the capacitance of the capacitor b of the phase-rotation chain

Claims (1)

Claim A CS generator containing an operational amplifier, a phase-shifting circuit consisting of two capacitors, the first plates of which are combined and connected to the common bus, the first resistor connected parallel to the first capacitor and the second plate of the second capacitor connected to one output of the second resistor, characterized in that , in order to increase the temperature stable frequency and reduce the influence of the parameters of active elements on the generation frequency, three resistors are introduced into it, an amplifier with automatic adjustment of the amplification I and the current source on the second operational amplifier, the second lining of the first capacitor through the third resistor connected to the second plate of the second capacitor, the second lining of the first capacitor through the fourth resistor connected to the inverting input of the first operational amplifier, the second output of the second resistor through the fifth resistor connected to the common bus and directly to the noninverting input of the first operational amplifier; the output of the first operational amplifier is connected to the input of the amplifier with an automatic second gain control whose output is connected to an input of the current source to the second operational amplifier whose non-inverting input is connected to the second plate of the first capacitor, and an output - to vhrdu automatic gain control circuit.