CR OSCILLATION CIRCUIT

A CR oscillation circuit includes inverters forming a loop for circulation of a signal, CR time constant circuits inserted into the loop for delaying the signal, each circuit having a capacitor, a plurality of resistance elements, and a transmission gate that selects an arbitrary resistance element...

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1. Verfasser: SHIRAO Akira
Format: Patent
Sprache:eng
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Zusammenfassung:A CR oscillation circuit includes inverters forming a loop for circulation of a signal, CR time constant circuits inserted into the loop for delaying the signal, each circuit having a capacitor, a plurality of resistance elements, and a transmission gate that selects an arbitrary resistance element of the plurality of resistance elements as a charge and discharge path of the capacitor, and a gate voltage generation circuit as means for outputting a gate voltage for controlling ON/OFF of each transmission gate that outputs a constant voltage in conjunction of a threshold voltage of a field-effect transistor as a gate voltage for turning ON the transmission gate.