SU855932A1 - Two-cycle quartz generator - Google Patents

Description

(54) TWO-CLOCK QUARTZ GENERATOR

I

The invention relates to radio engineering and can be used in radio receiving and radio transmitting equipment of communication devices.

A two-stroke quartz oscillator is known, each arm of which is made of a three-point capacitive circuit on a field-effect transistor with a load in the drain circuit, and containing a common quartz resonator 1.

However, this crystal oscillator has an insufficiently high stability and the magnitude of the amplitude of the generated oscillations.

The purpose of the invention is to increase stability while simultaneously increasing the amplitude of the generated oscillations.

The goal is achieved by the fact that in a two-stroke quartz oscillator that contains a common quartz resonator and each arm of which is made in a three-point capacitive circuit on a field-effect transistor with a load in the drain circuit, the load of each arm is made in the form of an additionally introduced field-effect transistor, the gate directly, and the source through a resistor connected to the drain of the corresponding field-effect transistor of the corresponding shoulder, and the quartz resonator is connected between the drains of the field-effect transistors, whose sources are Dineny through additionally introduced resistor, and the gates are connected to the common.

The drawing shows a circuit diagram of a two-stroke quartz oscillator.

A push-pull quartz oscillator contains a quartz resonator 1, two arms made on field-effect transistors 2 and 3 with loads 4 and 5 in the drain circuit, made in the form of additionally introduced field-effect transistors 6 and 7 with resistors 8 and 9 in the source circuit, and resistors 10-12 and capacitors 13-15.

The push-pull quartz oscillator works as follows.

For antiphase oscillations, the elements of the interstage coupling of field-effect transistors 2 and 3 have equipotential points, which, under the condition of self-excitation or stationary mode of the generator, can be considered short-circuited, which makes it possible to consider the phase condition of excitation for a one-cycle generator:

capacitive three-point scheme with the corresponding conversion parameters. For the proposed scheme, such elements are; with a quartz resonator 1 with resistance; replacing the equivalent circuit, capacitor 15 with capacitance C, and resistor 11 with resistance Ri.Ta.KHM, in a three-point scheme, the condition of self-excitation is satisfied if there is a quartz resonator with a resistance of 0.5 Zee between the drain of the zero transistor 3 million 2 and common H1nn. , and between the source and the common 1NINA - a capacitor 15 and a resistor 11 with a capacitance and a resistance of 2C and 0.5 R, respectively. The amplitude of the self-excitation is performed and the excitation is achieved by matching the values of the capacitors 13 and 14 field points transit 1 hundred) () in 2 and 3 with 11 monitors of resistors K) - - 12.

In the proposed automatic installation of the laser, the galvanic connection of the gates of the zero transistors 2 and 3 is common to the common generator; to the generator of the oscillator; () 1k) .nite; 1yu introduced H1N) x Ho.ieniji t) crisis 10p () 15 6 n 7 with zero-phase TpaHSHCiopiJB 2 and 3 effluents that claim / Gyucht in .. Replacement for 1-in () p11th currents of the HCJ.ICHIMX transistors 2, 3, ti and 7 for amn, () .lobnjnn) and variations. . (|) aktorov. 1ng -; ; mnsg ;; nilr / kenny. Use of chos;: sd () vats. 1-on-line .1elnoy balanced circuit -D .H.) Aerial current, formed1: g ;; | no ..- ii, iMii t |) а1; conformative 2, 3, bn 7 n rssie / oao I,), H) n 12 ensures the invariance of the wolves of the working point, since nrn 3i, (their identical dimensions ; 1Stig ;; С1г b.chlans of the bridge circuit, which cdCTai llechny; lena from the transistors included 2, bn 3, 7. At the base of the circuit the change is nanr-1n1 tan1-:: applied to one diagon; 1n mpsg; -; does not cause a change in the current value of the other diagonal: n1 - resistor 11. The initial amplitude of the auto-oscillation of the circuits is given by lu: using dnnamicheskmy .-: 1 (in

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Claims (1)

Claim A push-pull quartz oscillator, which contains a common quartz resonator and each arm of which is made of a three-point capacitive circuit on a field-effect transistor with a load in the drain circuit, characterized in that. in order to increase stability while simultaneously increasing the amplitude of the generated oscillations, the load of each arm is made in the form of an additionally introduced field-effect transistor, the gate of which is directly, and the source through the resistor is connected to the drain of the field-effect transistor of the corresponding arm, with a quartz polarizer connected between field drains. which are connected via an additionally inserted resistor, and the gates are connected to a common spike.