Oscillators – Ring oscillators
Patent
1994-02-15
1995-06-27
Grimm, Siegfried H.
Oscillators
Ring oscillators
331 45, 331 60, 331177R, H03B 502, H03B 2700
Patent
active
054283183
ABSTRACT:
A voltage controlled ring oscillator whose frequency does not depend on the number of stages in the ring oscillator. The inventive voltage controlled ring oscillator comprises N inverters connected in series with the output of the Nth inverter being coupled into the input of the first inverter. The output of each inverter is connected to a transconductance amplifier. The outputs of all transconductance amplifiers are summed. The oscillation period of the circuit is 2t.sub.d, (where t.sub.d is the delay of one inverter) which is independent of the number of inverters in the ring oscillator.
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Alber Oleg E.
AT&T Corp.
Grimm Siegfried H.
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