SU1363420A1 - Quartz oscillator - Google Patents

Abstract

Invention m. used in information-measuring technology, for example, for the construction of multichannel systems for measuring physical quantities. The purpose of the invention is to provide generation of N frequency signals. The quartz generator contains the first transistor (T) 1, the emitter follower (EP) 3, a long line 4 with (N-1) taps, two capacitors 5.6, parallel to the LC circuit 7, resistors 8, 9, 10, 11, 12 , quartz resonator (KP) 14. To ensure the goal, the second T2, additional (N-1) KP 18, (N-1) T 13, (N-1) EP 15, parallel LC circuits 16, (N-1 ) capacitors 17, (N-1) coupling capacitors 19. 1 Il. Q p mm oo at) One ii F Er,

Description

The invention relates to radio engineering and can be used in information and measurement technology, for example, for the construction of multichannel systems for measuring physical quantities.

The purpose of the invention is to provide generation of N frequency signals.

The drawing shows a circuit diagram of a crystal oscillator.

The quartz generator contains the first transistor 1, the second transistor 2, the emitter follower 3, a long line 4 with (N-1) taps, the first and second capacitors 5 and 6, parallel to the LC circuit 7, resistors 8-12, (N-1) Additional transistors 13, 13-, ...,, quartz resonator 14, (N-1) additional zmitterne repeaters 15, 15, ..., 15 ,,, (N-1) additional parallel LC circuits 16, 16, ..., 1bm-1, additional capacitors 17, 17

17

N-1

(N-1) additional

2

quartz resonators 18, 18

18 (, coupling capacitors 19, 19,

   5 1 9 fj,.

Quartz generator works as follows.

The first transistor 1 and (N-1) additional transistors 13 ,, 13.,. “. 13., form together with the second

30 and with the supply bus j at this base of the first transistor through appropriate resistors connected to the corresponding buses of the power source, the second output of the first capacitor is connected to the collector of the first transistor, characterized in that, to ensure the generation of signals of N frequencies, the second transistor is inserted (N-1) extra quartz35

a transistor 2 N amplifier stages, made in a cascade scheme, which are covered by the corresponding positive feedback circuits through the corresponding first and second capacitors 5 and 6, an emulator of the repeater 40, resonators, (N-1) additional Rated 3, (N- 1) additional capacitors, the collectors of which are collectors 17 ,, 17j, ..., 17.,, condenser corresponding inputted additional 18

eleven

SATs of communication lu ,, yu, ...,

additional emitter repeaters 15 ,, 15,. . ., 15 m.

The quartz resonator 14 and (N-1) additional quartz resonators 18 ,, 18, ..., 18 | 4., Have different resonant frequencies, and the distance from the second terminal of the long line 4 to its corresponding outlet is chosen in accordance with the resonant frequency of the quartz resonator 14 or (N-1) additional quartz resonators 18 ,, 18, ..., 18 | ,, and a multiple of a quarter of the wavelength corresponding to the generated oscillations.

When the necessary self-excitation conditions are fulfilled on the parallel LCs, the parallel LC circuits are connected to the power bus, and the bases and

45 emitters of which are connected respectively to the base and emitter of the first transistor, (N-1) additional emitter followers, the input of each of which is connected to the collector of the corresponding of (N-1) additional transistors through a respective input 50 additional capacitor, and the output of each (N-1) additional emitter followers through

55, the corresponding input coupling capacitor is connected to the emitter of the second transistor, (N-1) additional emitter followers are connected to the power source, the emitter of the first

circuit 7 and (N-1) additional parallel LC circuits 16 ,, 16, ... 16f ,,, there are N vibrations with different frequencies. In this case, in the long line 4, the mode of standing waves arises, and at the first output and the taps a maximum oscillation is provided with a tuning frequency equal to the resonant frequency of the quartz resonator 14 or corresponding from (N-1) additional quartz resonators 18, 18 ,. .., 18 ((.,.

Resistors 8-12 provide a constant current quartz oscillator f.iy current mode.

Claims (1)

The formula is invented 1 Quartz generator containing a long line, to one of the terminals of which is connected the first quartz resonator, the emitter follower, which is connected to the power source, the first and second capacitors, the first terminals of which are connected respectively to the input and output of the emitter repeater, the first parallel LC circuit, which is turned on between the collector of the first transistor and the power bus j at this base of the first transistor is connected to the corresponding buses of the power source through the corresponding resistors, the second output of the first capacitor is connected to the collector of the first transistor, characterized in that, to ensure the generation of signals of N frequencies, the second transistor is inserted ( N-1) extra quartz resonators, (N-1) additional transistors, the collectors of which are connected to the power bus through appropriate input additional parallel circuits, and the emitters of which are connected respectively to the base and the emitter of the first transistor, (N-1) additional emitter followers, the input of each of which is connected to the collector of the corresponding of (N-1) additional transistors through the corresponding input additional capacitor -1) additional emitter followers through the corresponding input coupling capacitor is connected to the emitter of the second transistor, (N-1) additional emitter followers are connected to the power source, the emitter of the first  1363420 the transistor is connected to the collector resonators connected the second transistor, the base and the emitter to the corresponding tap of a long lvvtorogo transistor through the corresponding with (N-1) taps, another pin These resistors are connected to a single long line with (N-1) taps to the corresponding power supply lines, connected to the base of the first transistor, and and the second output of the second capacitor is the distance between the second output of the length of the podpodkpuchen to the emitter of the second transisse line with (N-1) taps and each torus, while the length of the line is done from its outlets multiple of a quarter of the length the yen is in the form of a long line with (N-1) from the-IQ wave corresponding to the generator, the conclusions of each of the (N-1) signals.