Low-jitter oscillator

Details Low-jitter oscillator Low-jitter oscillator

1990-11-15

1991-11-05

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331108C, 331158, H03B 536

Patent

active

050633597

ABSTRACT:
An oscillator, such as a crystal oscillator, is presented for low jitter (low phase noise) applications, such as in frequency synthesizers or digital repeaters. The two terminals of a resonator are coupled to the input and output of an amplifier, the amplifier together with other components effecting a negative impedance. The inputs of a comparator are connected to the terminals of the resonator. The output of the comparator, preferably differential, is a signal having a frequency substantially determined by the resonator.

REFERENCES:
patent: 4383224 (1983-05-01), Saari
patent: 4853655 (1989-08-01), Embree et al.
"An Analysis of Inverter Crystal Oscillators", RF Design, INFO/CARD 23, Aug. 1989, Leonard L. Kleinberg, pp. 28,29,31,32.
"Negative Gain-Single Pole Oscillators", RF Design, INFO/CARD 30, Sep. 1990, Leonard L. Kleinberg, pp. 35, 36, & 38.
Modern Communication Circuits, Jack Smith, McGraw-Hill Book Company, 1986, pp. 238-278.

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