Ring oscillator and pulse phase difference encoding circuit

Details Ring oscillator and pulse phase difference encoding circuit Ring oscillator and pulse phase difference encoding circuit

1995-02-22

1996-06-18

Grimm, Siegfried H.

Oscillators

Polyphase output

331 57, 331 60, 331173, 331DIG3, H03B 500

Patent

active

055282008

ABSTRACT:
A ring oscillator for circulating pulse edges of two types therein includes an even number of inverting circuits connected in a ring. Each of the inverting circuits is operative to invert an input signal and output an inversion of the input signal. One of the inverting circuits is a first start inverting circuit which starts an operation of inverting an input signal in response to a first control signal applied from an external input. One of the inverting circuits except the first start inverting circuit and an inverting circuit immediately following the first start inverting circuit is a second start inverting circuit which starts an operation of inverting an input signal in response to a second control signal. A control signal inputting arrangement serves to input the second control signal to the second start inverting circuit during an interval from a first moment at which the first control signal is input into the first start inverting circuit and the first start inverting circuit starts the inverting operation to a second moment at which a pulse edge initially generated by the start of the inverting operation of the first start inverting circuit and travelling while being sequentially inverted by the inverting circuits enters the second start inverting circuit.

REFERENCES:
patent: 3350659 (1967-10-01), Henn
patent: 4105950 (1978-08-01), Dingwall
patent: 4517532 (1985-05-01), Neidorff
patent: 4978927 (1990-12-01), Hausman et al.
patent: 5128624 (1992-07-01), Hoshino et al.
patent: 5134371 (1992-07-01), Watanabe et al.
patent: 5179438 (1993-01-01), Morimoto

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