SU400969A1 - FREQUENCY MANPULATED QUARTZ - Google Patents

Description

one

The invention relates to the field of radio and telecommunications and can be used in drivers of radio transmissions of devices with a frequency of telegraphy.

As is known, quartz oscillators with frequencies of telegraphy are known in which the translation from the axial frequency of the harmonic pa is made by changing the conditions of the excited resonator. However, a change in the mode of an active element with a constant current and the magnitude equivalent to the loss in the quartz resonator circuit reduces the frequency stability of the circuit, leading to a change in the amplitude of the output voltage and sometimes to a breakdown of the oscillations.

The aim of the invention is to improve the operation stability and frequency stability of the generator.

This is achieved by the fact that in the proposed generator the emitter of the transistor is connected to the common bus through a series-connected commutator co-sensor and manipulator. A frequency multiplier is connected to the collector of the transistor through a coupling capacitor.

The drawing shows the principle scheme of the proposed generator.

It contains a V-generator, performed by a three-point electrical circuit (harmonics) on a transistor / with a quartz resonator 2. Koppe; TiipyioHiei i 11idu kt1gvnost1u L and dividing capacitor 4, included and the base day, 5, 6 and 7 that set the mode of its operation to the current of the current, and the external 1 m resistor 8 in the value of the cool. leKTOpa, parallel to the resonant circuit, CONDITION 1111; the conductance .9 and the capacitor 10 to the emitter circuit, the phasing capacitor // and a blocking capacitor:, 12 and 13. as well as a switched-on P1iul toro ma: and 14 co-id SATOR 15. To the output of the autogenerator through the coupling capacitor 16 1Odkl oche umiol ntel frequency / 7.

The device uses the frequency multiplicity of a 1-wave resonator, which occurs when it is excited at the fundamental frequency and ia of mechanical harmonics. For this, the quartz resonator is excited alternately at the fundamental frequency, then at the mechanical harmonic by connecting the P15 to the KolOtel iLO and capacitor 15, switched by the psuhl toro. 14. The capacitor 15 is chosen so large that the phase ratio of the materatoretoretoretoreyerezero will be used in the fuseroreto mode. would have been for

Restoatsra 2 and

its output is harmonic to. Circuit 9, 10 is tuned so that the generator has 1 liter: depending on the condition that the resonator ia is excited to the desired harmonic. Options

The frequency multipliers are chosen so that when the resonator 2 is excited at the fundamental frequency, it operates in the frequency multiplication mode, and (excitation of the resonator on the armonic is opahed) the signal strength.

TaiKHM, at the generator output, the voltage appears with a frequency equal to either the frequency of the generator, working on the mechanical harmonics of the resonator, or the frequency equal to the multiplied frequency of the generator operating at the fundamental frequency of the resonator.

The frequency oscillator frequency (operating on mechanical harmonics) to the fundamental frequency of the resonator leads to the fact that the frequency obtained with the multiply fundamental frequency of the generator differs from the frequency of the mechanical harmonic of the quartz resonator, and this difference reaches 70-100 kHz at the fundamental frequency of the quartz resonator 10-15 MHz n when excited

resonator, naimimer, and third harmonica.

PRIORITY AND RESPONSIBILITY

Frequently mapped: a quartz1 oscillator containing a transistor, the emitter of which includes a parallel resonant circuit, and a base through a series-connected capacitor, inductance and a quartz resonator connected to a common bus, a phase capacitor switched off between the base and the emitter of the transistor, the switched capacitor n keypad , characterized in that, in order to raise

stability of operation and stability of the generated frequency, the emitter of the transistor is connected through the above-mentioned mentioned switched capacitor and manipulator to a common bus, while a frequency multiplier is connected to the collector of the transistor through a coupling capacitor.

I

/ J

/ ff

6sh