Oscillator having multi-phase complementary outputs

Details Oscillator having multi-phase complementary outputs Oscillator having multi-phase complementary outputs

2006-02-07

2006-02-07

Kinkead, Arnold (Department: 2817)

Oscillators

Plural oscillators

C331S045000, C331S050000, C331S057000

Reexamination Certificate

active

06995620

ABSTRACT:
An oscillator having multi-phase complementary outputs comprises a first plurality of single ended amplifiers connected in series to form an input and an output and a second plurality of single ended amplifiers connected in series to form an input and an output. The first and second plurality have the same odd number of amplifiers, A first feedback path connects the output to the input of the first plurality of amplifiers to establish oscillations in the first plurality of amplifiers at a frequency dependent upon the delay time from the input to the output of the first plurality. A second feedback path connects the output to the input of the second plurality of amplifiers to establish oscillations in the second plurality of amplifiers at a frequency dependent upon the delay time from the input to the output of the second plurality. A first locking circuit is connected between comparable first points in the first and second plurality of amplifiers to ensure that the first points are oscillating in complementary fashion and a second locking circuit is connected between comparable second points in the first and second plurality of amplifiers to ensure that the second points are oscillating in complementary fashion.

REFERENCES:
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PCT International Search Report dated Oct. 16, 2001 for corresponding PCT Application No. PCT/US00/42762 filed Dec. 12, 2000.
Kumar, V., “Digital Technology Principles and Practice,” John Wiley & Sons. 1995, pp. 626-629.

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