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1. 发明专利

JPH06152399A CIRCUIT AND METHOD FOR VOLTAGE-CONTROLLED OSCILLATION 失效
公开(公告)号：JPH06152399A
公开(公告)日：1994-05-31
申请号：JP27289592
申请日：1992-10-12
申请人： SILICON SYSTEMS INC
发明人： SHIYUNSAKU UEDA , KUUEIIKUON RAMU , KUREIGU ROBAATOSON
IPC分类号： H03K4/12 , H03K3/0231 , H03L7/099
摘要： PURPOSE: To provide a linearized and delay-compensated full-CMOS VCO. CONSTITUTION: A transconductance converter 101 supplies a control current to a voltage-controlled lamp circuit which outputs two lamp voltage outputs, to the positive input terminals of two comparators 205 and 206 upon receiving a controlled-voltage input and the comparators 205 and 206 compare the lamp voltages with a threshold voltage and, when the lamp voltages cross the threshold voltage, output pulses to a latch. A compensating loop receives the oscillation output and control current of the latch as inputs, gives the threshold voltage to each comparator, and incorporates a similar current control circuit and the circuit outputs the same lamp outputs as that of a first current-controlled lamp circuit. A track hold circuit which is triggered by an oscillated output supplies the peak voltage of the lamp outputs to the negative input section of a differential amplifier 211 through a low-pass filter. An external reference voltage is supplied to the positive input section of the amplifier 211 and the output of the amplifier 211 is outputted to each comparator as the threshold voltage, and then, the influences of the delays of the comparators and latch are canceled by the compensating loop.

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