Emitter-coupled oscillator with differential switching control

Details Emitter-coupled oscillator with differential switching control Emitter-coupled oscillator with differential switching control

1993-01-21

1994-10-18

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 34, 331144, 331176, 331177R, H03B 504, H03B 524, H03L 102, H03L 7099

Patent

active

053572203

ABSTRACT:
An emitter-coupled oscillator circuit suitable for monolithic integration. The emitter-coupled oscillator circuit comprises (a) switching means for producing at an output port an output signal having a variable oscillation frequency, and the switching means has first and second inputs for receiving a differential control signal and the switching means includes first and second terminals for connecting to a capacitor; (b) output port means coupled to the output port of the switching means for outputting the output signal; (c) frequency control means coupled to the first and second terminals of the switching means for adjusting the oscillation frequency of the output signal; and (d) switching control means for producing a differential control signal at first and second outputs coupled to the first and second inputs respectively of the switching means and the switching means being responsive to the differential control signal for producing the output signal, and the switching control means having a control terminal coupled to the frequency control means.

REFERENCES:
patent: 4977381 (1990-12-01), Main
patent: 5034706 (1991-07-01), Betti et al.
A250-MHz Monolithic Voltage-Controlled . . . , Ting-Ping Liu et al., IEEE,JSSC, Apr. 1990, pp. 555-561.
A Low-Power 128 MHz VCO . . . , Kazuo Kato et al., IEEE,JSSC, Apr. 1988, pp. 474-479.
Bipolar & Mos Analog Integrated Circuit . . . , Allan Grebene, Wiley, 1984, pp. 571-575.
A Highly Stable VCO . . . , Robert Cordell et al., IEEE,JSSC, Dec. 1975, pp. 480-485.

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