LOW-VOLTAGE OSCILLATION AMPLIFIER CIRCUIT AND PORTABLE ELECTRONIC DEVICE COMPRISING THE SAME,申请号WO1998JP05115-传众专利搜索

LOW-VOLTAGE OSCILLATION AMPLIFIER CIRCUIT AND PORTABLE ELECTRONIC DEVICE COMPRISING THE SAME

申请公布号：WO9926334(A1)

申请号：WO1998JP05115

申请日期：1998.11.13

申请公布日期：1999.05.27

申请人：

SEIKO EPSON CORPORATION;HASHIMOTO, MASAMI

发明人：HASHIMOTO, MASAMI

分类号：H03K3/012;H03K3/03;H03K3/354;(IPC1-7):H03B5/06;H03K3/353

主分类号：H03K3/012

摘要：A low-voltage oscillation amplifier circuit has an amplifier circuit (120) comprising a switching circuit (110) in which first and second MOSFETs (1, 2) of the same conductivity are connected in series and gate electrodes are connected to each other, a third MOSFET (3) of a first conductivity whose gate and drain electrodes are connected to each other, and a fourth MOSFET (4) of a second conductivity whose gate and drain electrodes are connected to each other. The body potentials of the P- and N-type MOSFETs (4, 3) constituting the amplifier circuit (120) are controlled by a control signal and its inverted signal. The amplifier circuit (120) can be operated on a very low voltage by apparently lowering the threshold voltages of the third and fourth MOSFETs (3, 4). When the switching circuit (110) is turned off to turn off the amplifier circuit, leak current can be almost completely cut off by apparently raising the threshold voltage of the second MOSFET (2).