Oscillator
AssigneeTokyo Shibaura Electric Co., Ltd.
InventorsHisashi Yamada, Yoshinori Horiko
Life of this patent
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Abstract
An oscillator having a phase-inverting oscillation inverter formed of insulated gate field effect transistors, a feedback circuit for inverting the phase of an output signal from the phase-inverting oscillation inverter and feeding the phase-inverted output signal back to the input side of the phase-inverting oscillation inverter and an amplifier for amplifying an output signal from the phase-inverting oscillation inverter. Said feedback circuit is formed of a passive circuit and has a larger voltage gain than 1. The signal fed back by the feedback circuit is drawn out from the input side of the oscillation inverter and delivered to the succeeding amplifier.
Claims13
An oscillator comprising a first inverter formed of insulated gate field effect transistors and acting as an oscillator;
- a feedback circuit formed of a passive circuit and designed to invert the phase of an output signal from the first inverter, amplify the output signal with a larger voltage gain than 1 and feed the output signal back to the input side of the first inverter;
- and means for drawing out the output signal of the feedback circuit from the input side of the first inverter and delivering said output signal to a succeeding second inverter acting as an amplifier.
An oscillator which is of the Colpitts type and comprises a first inverter formed of insulated gate field effect transistors and acting as an oscillator;
- a feedback circuit formed of a passive circuit and designed to invert the phase of an output signal from the first inverter, amplify said phase-inverted output signal with a larger voltage gain than 1 and feed the amplified output signal back to the input side of the first inverter;
- and means for drawing out the output signal of the feedback circuit from the input side of the first inverter and delivering said output signal to a succeeding second inverter acting as an amplifier.
An oscillator which is of the Hartley type and comprises a phase-inverting oscillation inverter formed of insulated gate field effect transistors;
- a feedback circuit formed of a passive circuit and designed to invert the phase of an output signal from the phase-inverting oscillation inverter, amplify said phase-inverted output signal with a larger voltage gain than 1 and feed the amplified output signal back to the input side of the phase-inverting oscillation inverter;
- and means for drawing out the output signal of the feedback circuit from the input side of the oscillation inverter and delivering said output signal to the succeeding amplifier.
Dependencies are inferred from the claim text.