Monolithic integrated transistor HF crystal oscillator circuit

Details Monolithic integrated transistor HF crystal oscillator circuit Monolithic integrated transistor HF crystal oscillator circuit

1984-07-27

1985-12-24

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

330252, 331159, H03B 536

Patent

active

045609551

ABSTRACT:
To increase the gain and, consequently, to increase the voltage amplitude appearing at the crystal of a crystal oscillator a conventional circuit including a first differential amplifier in the amplifier section and two further differential amplifiers in the phase shifting section is modified to include a fourth differential amplifier in the amplifier section. The fourth amplifier carries an additional current to flow in the two differential amplifiers causing an additional current to flow and across the operating resistance of the two differential amplifiers an additional voltage drop being fed to the crystal via an emitter follower.

REFERENCES:
patent: 3763439 (1973-10-01), Peil
patent: 3973221 (1976-08-01), Jett, Jr.
patent: 4128817 (1978-12-01), Gomi

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