SU1559390A1 - Shock-excited crystal oscillator - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the frequency stability. The quartz shock excitation generator contains a shock pulse shaper 1, a differential transformer 2, a crystal oscillator 3, a neutralizing capacitor 4, a resistor 5, a resonant amplifier 7, a phase detector 9, a low-pass filter 10, a controlled crystal oscillator 11, a frequency control element 12, a phase shifter 13, a key 14, an amplitude detector 15, an integrator 16 and a kipp-relay 17. The goal is achieved by introducing a bias voltage source 6, a resonant amplifier 8, a DC amplifier 18, a frequency divider 19, a mixer 20 part t, the frequency multiplier 21, the frequency detector 22, varactor 23 and capacitor 24, which is provided with means necessary sensitivity frequency control circuit and eliminated exposure control voltage on the quartz resonator 1 3. yl.

Description

one

(21) 4369779 / 24-09

(22) 01/25/88

(46) 04.23.90. Bul Number 15

(71) Novorossiysk Higher Marine Engineering School

(72) Yu.S. Ivanchenko and I.I. Buymala

(53) 621.373.5 (088.8)

(56) USSR Copyright Certificate No. 465705, cl. H 03 B 5/32, 1972.

Copyright certificate of the USSR And 959255, cl. H 03 B 5/32, 1981.

(54) QUARTZ SHOCK-EXCITATION GENERATOR

(57) The invention relates to radio engineering. The purpose of the invention is to increase the frequency stability. The quartz shock excitation generator contains a shock pulse shaper 1, a differential transformer

2, crystal oscillator 3, neutralizing capacitor 4, resistor 5, resonant amplifier 7, phase detector 9, low-pass filter 10, controlled crystal oscillator 11, frequency control element 12, phase shifter 13, switch 14, amplitude detector 15, integrator 16 and kipp-relay 17 The goal is achieved by introducing a bias voltage source 6, a resonant amplifier 8, a DC amplifier 18, a frequency divider 19, a frequency mixer 20, a frequency multiplier 21, a varicap 23 frequency detector 22, and a coupling capacitor 24, by which about espechivaets required sensitivity frequency control circuit is eliminated and the impact of the control voltage on the quartz resonator 3 "1-yl,

SL

SP

with

31

The invention relates to radio engineering and can be used as a source of stable electrical oscillations,

The purpose of the invention is to increase the frequency stability

The drawing shows a structural electrical circuit of a quartz oscillator of shock excitation.

The quartz percussion excitation generator contains a shock pulse shaper 1, a differential grissforkator 2, a quartz resonator 3, a neutralizing capacitor 4, a resisto 55 bias bias voltage source, the first 7 and second 8 resonant amplifiers, a phase detector 9, a low-pass filter 10, controlled zzotsez generator 11, frequency control element 12, phase shifter 3, key 1, amplitude detector 15 ч гра гра gragra 16, kip-relay 17 amplification tvni, 18 dc, divider 1 frequency 9 frequency mixer 20, frequency multiplier 21, frequency frequency then 22, 23 varicap separation concentration dzisator 2,

The quartz shock excitation generator works as follows.

The shock pulse formed by the shaper 1 is supplied to a quartz resonator 3 connected to the first winding of the differential transformer 2, the Neutralizing capacitor C neutralizes the static capacitance of the quartz resonator 3 and is connected to the second winding of the differential transformer 2. The signal from the third

differential transformer winding- 4Q Initial offset on a varicap 23

torus 2, loaded on resistor 5, in the form of an oscillation spectrum is fed to the inputs of the first 7 and second 8 resonant amplifiers, respectively, tuned to the frequency of the main harmonic oscillations of the quartz resonator 3 and its mechanical harmonics. If the quaichemic resonator 3 is a harmonic 8L1Y9, then to obtain close frequencies at the inputs of the mixer 20 to the output

45

It is provided with the source 6. The separation capacitor 2A excludes the effect of the control voltage on the crystal crystal 3

Claims (1)

Invention Formula A quartz percussion excitation generator containing a shock pulse shaper differential A second transformer amplifier 8 has a sub-transformer, the first pins of the first, keys are a multiplier 21, and if the quartz, the second and third windings of which the resonator 3 is non-harmonic, then the multiplier 21 is connected as a common bus to the common bus, the first terminal of which is connected to the second pin of the first tel frequency. connected to a common bus; neutralizing capacitor, the first terminal of which is connected to the second terminal of the first The signal amplified by the first resonance-55 winding of the differential transformer amplifier 7 is fed to the permator, a quartz resonator, the first inputs of the mixer 20 and the phase signal of which is connected to the second 9 a detector from the mixer output five 0 five 0 five The 20 signal is fed to the input of the multiplier 21 and the amplitude detector 15. The second input of the phase detector 9 receives a signal from the controlled crystal oscillator 11. The output CHI from the phase detector 9 through the filter 10 is fed to the element 12, which adjusts the frequency and phase of the controlled a quartz oscillator 11 for the frequency and phase of a quartz resonator 3 A phase shifter 13 is connected to the second output of the controlled quartz oscillator 11, which ensures the continuous oscillation of the damping oscillations. The signal from the phase rotator 13 through the key goes to stroke shaper 1. Key 1 is switched blanking pulse coming from Kipp-switch 17 with adjustable length. The duration of the output pulse from the KPP relay 17 is controlled by a DC voltage taken from the output of the integrator 16, to the input of which the detected voltage is fed from the output of the amplitude detector 15- When the amplitude of the output signal on the output of the mixer 20 changes, the DC voltage on the input of the KIPP relay 17, resulting in a change in the duration of its output pulses and, accordingly, the time for which the key H is opened. The output signal of the mixer 20 is fed to the input of the multiplier 21, which provides necessary sensitivity frequency control circuit consisting of the frequency detector 22, amplifier 18 and varactor 23. The initial offset on the varicap 23 It is provided with the source 6. The separation capacitor 2A eliminates the influence of the control voltage on the quartz resonator 3 Invention Formula A quartz percussion excitation generator containing a shock pulse shaper differential transformer, the first conclusions of the first, second and third windings of which connected to a common bus, neutralizing capacitor, the first output of which is connected to the second output of the first differential transformer windings, quartz resonator, the first output of which is connected to the second the output of the second winding of the differential transformer, the first resonant amplifier, serially connected controlled crystal oscillator, phase shifter and key, phase detector, bursted and second inputs of which are connected to the outputs of the first resonant amplifier and controlled crystal oscillator, successively connected low-pass filter and control element frequency, the output of which is connected to the control input of the controlled quartz oscillator, serially connected amplitude detail A vector, an integrator, and a KIPP relay, the output of which is connected to the control input of the switch, a resistor that is connected between the input of the first resonant one. amplifier and common bus, while the output of the phase detector is connected to the input of a low-pass filter, the second input of the kip-relay is a reference voltage input, characterized in that, in order to increase frequency stability, the second connected in series 0 resonant amplifier, frequency divider, frequency mixer, frequency multiplier, frequency detector and direct current amplifier, varicap, the first output of which is connected to the output of the direct current amplifier, and the second output of which is connected to the common bus, the bias voltage source, (output connected to the first output of the varicap, the separation capacitor, which is connected between the first output of the varicap and the second output of the quartz resonator, while the output of the pulse shaper is connected to the output of the key and the second in water neutralizing capacitor, a second input of the resonance amplifier is connected to the second terminal tre- 0 tey differential transformer winding and the input of the first resonance amplifier, a second input of the frequency mixer is connected to the output of the first resonance amplifier input amplitude detector connected to the output of the mixer frequencies. five five