Title:
LOW VOLTAGE OPERATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2017/110102
Kind Code:
A1
Abstract:
To provide an operation amplifier that maintains a voltage gain even when an input voltage is reduced.
An operation amplifier of the present invention is provided with: a first amplifier circuit, which amplifies a voltage difference between first and second input signals, and outputs a first output signal; a second amplifier circuit, which amplifies the first output signal, and outputs a second output signal; a first transistor, i.e., a first current source; a second transistor, which is current mirror-connected to the first transistor, and is provided, as a second current source for the first amplifier circuit, on the grounding side of the first amplifier circuit; and a third transistor, which is current mirror-connected to the first transistor, and is provided, as a third current source for the second amplifier circuit, on the grounding side of the second amplifier circuit.
Inventors:
WATANABE YOSHITAKA (JP)
Application Number:
PCT/JP2016/059244
Publication Date:
June 29, 2017
Filing Date:
March 23, 2016
Export Citation:
Assignee:
SIMPLEX QUANTUM INC (JP)
International Classes:
H03F3/45
Foreign References:
| JP2001007665A | 2001-01-12 | |||
| JP2006033537A | 2006-02-02 | |||
| JP2002314355A | 2002-10-25 | |||
| JP2001160721A | 2001-06-12 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
Download PDF: