Cross coupled differential oscillator

Details Cross coupled differential oscillator Cross coupled differential oscillator

1997-03-12

1999-04-20

Grimm, Siegfried H.

Oscillators

Ring oscillators

331108A, 331177R, 327270, 327274, H03B 502, H03K 3354

Patent

active

058960694

ABSTRACT:
A multi-stage apparatus used as a voltage controlled oscillator. Each stage includes a first complementary differential current switch and a second complementary differential current switch with a second set of complementary differential current switches having a first complementary differential current switch and a second complementary differential current switch, the two sets of complementary differential current switches are connected in a push pull arrangement. In this arrangement, the outputs of the first complementary differential current switch of the first set of complementary differential current switches and the first complementary differential current switch of the second set of complementary differential current switches are connected with the input of the second complementary differential current switch of the first set of complementary differential current switches. The outputs of the second complementary differential current switch of the first set of complementary differential current switches and the second complementary differential current switch of the second set of complementary differential current switches are connected with the input of the first complementary differential current switch of the second set of complementary differential current switches. A controlled complementary voltage clamp is connected to the output nodes of the first set of complementary differential current switches and a controlled complementary voltage clamp is connected to the output nodes of the second set of complementary differential current switches.

REFERENCES:
patent: 5426398 (1995-06-01), Kuo
patent: 5436939 (1995-07-01), Co et al.
patent: 5703541 (1997-12-01), Nakashima
1993 IEEE International Solid-State Circuits Conference--M. Horowitz et al., "TP 10:5: PLL Design for a 500 MB/s Interface", Feb. 1993, pp. 93, 161, 282.

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