Abstract: An amplifier circuit with favorable linearity is provided. An amplifier of the present invention is provided with an amplifier MOS transistor, a diode-connected transistor block for negative feedback source impedance constituted by series-parallel connection of the limited number (including 0) of the diode-connected MOS transistors and connected to a source side of the amplifier MOS transistor, and a diode-connected transistor block for load constituted by series-parallel connection of the limited number of the diode-connected MOS transistors and connected to a drain side of the amplifier MOS transistor. A voltage gain is configured to be determined by a ratio of the sum of source impedance of the amplifier MOS transistor and the impedance of the diode-connected transistor block for negative feedback source impedance to the impedance of the diode-connected transistor block for load.
Type:
Grant
Filed:
May 14, 2009
Date of Patent:
March 1, 2011
Assignees:
Kabushiki Kaisha Nihon Micronics, NES Co., Ltd
Abstract: An amplifier circuit with favorable linearity is provided. An amplifier of the present invention is provided with an amplifier MOS transistor, a diode-connected transistor block for negative feedback source impedance constituted by series-parallel connection of the limited number (including 0) of the diode-connected MOS transistors and connected to a source side of the amplifier MOS transistor, and a diode-connected transistor block for load constituted by series-parallel connection of the limited number of the diode-connected MOS transistors and connected to a drain side of the amplifier MOS transistor. A voltage gain is configured to be determined by a ratio of the sum of source impedance of the amplifier MOS transistor and the impedance of the diode-connected transistor block for negative feedback source impedance to the impedance of the diode-connected transistor block for load.
Type:
Application
Filed:
May 14, 2009
Publication date:
December 3, 2009
Applicants:
KABUSHIKI KAISHA NIHON MICRONICS, NES CO., LTD.