SU1688375A1 - Optically controlled self-excited oscillator - Google Patents

Abstract

The invention relates to radio engineering and can be used to obtain frequency controlled harmonic vibrations. The purpose of the invention is the extension of the frequency tuning range. The optically controlled auto-oscillator contains an adjustable optical radiation source 1, an auto-oscillator 2 on the active element, an optically controlled two-port 3, a controlled-voltage source 4, a capacitor 5, and a field phototransistor 6. The auto-oscillator 2 contains interlock coils 7 and 18 inductors, capacitors 9 and 10, long lines 11 and 12, field effect transistor 13 and power sources 14 and 15. Source 4 contains an interlock inductance coil 16 and a power source 17. The purpose of the invention is achieved by increasing the range of variation of the reactive component of the conductivity of the two-port 3 due to the absence of a constant bias on the drain of the phototransistor 6, i.e. t floor in the source-drain structure. 1 il. (L C f 10 Exit about 00 00 with vj ate 15

Description

The invention relates to radio engineering and can be used to obtain frequency controlled harmonic vibrations.

The purpose of the invention is to expand the frequency tuning range,

The drawing shows a structural electrical circuit of an optically controlled oscillator.

The optically controlled auto-oscillator contains an adjustable optical radiation source 1, an auto-oscillator 2 on the active element, an optically controlled two-port 3, a source of controlled constant voltage 4, a capacitor 5, an outdoor phototransistor 6, an auto-oscillator 2 contains interlock inductors 7, 8 capacitors 9, 10, long lines 11, 12, field-effect transistor 13, power sources 14, 15, controlled voltage source 4, contains an interlock inductance 16 and power source 17.

Optically controlled oscillator works as follows

In the oscillator 2, harmonic oscillations occur on the active element, the frequency of which depends on the magnitude of the reactive conductivity component of the optically controlled two-port circuit 3. At the same time, the oscillator 2 on the active element is assembled on the field-effect transistor 13c oscillatory system, which is formed by a capacitor 9, long lines 11, 12, the gate-to-capacitance capacitance of the field-effect transistor 13, the mode of the field-effect transistor 13 at a constant current is set by the power sources 14, 15, which are connected to the circuit of the auto-generator 2 per ac through the blocking inductor 7, 8, the signal from the oscillator 2 on the active element is removed through the capacitor 10. The optically controlled two-pole 3 is optically coupled to an adjustable source of optical radiation 1 and is in the form of series-connected capacitor 5 and a drain-to-field source phototransistor 6. At the same time, a source of controlled direct voltage 4, which consists of a power source 17, connected in series with a blocking inductor 16, is connected between the gate and the source of the phototransistor 6.

The purpose of the invention is achieved by increasing the range of variation of the reactive component of the conductivity of the optically controlled two-port 3 due to the absence of a constant bias on the drain of the field phototransistor 6, i.e. The bottom floor in the source-drain structure.

Claims (1)

Invention Formula Optically controlled oscillator containing an adjustable source of optical radiation, an oscillator on the active element, an optically controlled two-port circuit that is connected to the control input of the oscillator on the active element and optically connected to an adjustable source of optical radiation, characterized in that, in order to extend the range frequency tuning, a controlled voltage source is introduced, and the optically controlled two-port device is designed as a series-connected capacitor and the drain-source of the field phototransistor, while the controlled voltage source is connected between the gate and the source of the field phototransistor