Patent ID: 8803621
Filing Date: 2014-08-12
Classification: H03B,H03L

Abstract:
1. A semiconductor device comprising: a first power supply section configured to supply a first power supply voltage; a second power supply section configured to supply a second power supply voltage; an amplitude control circuit section configured to receive said first and second power supply voltages and generate first and second supply voltages; and an oscillation circuit section configured to receive said first and second supply voltages from first and second input sections to carry out an oscillation, wherein said amplitude control circuit section comprises: a plurality of MOS transistors, which are connected in serial between said first and second power supply sections, and each of which is in a diode connection; a first output section connected with one of said plurality of MOS transistors to output said first supply voltage; and a second output section connected with another of said plurality of MOS transistors to output said second supply voltage, wherein a back gate of at least one of said plurality of MOS transistors is connected with a source thereof.