Title:
電流検出アンプ
Document Type and Number:
Japanese Patent JP6969884
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit having an operating characteristic equivalent to or higher than the conventional circuit, with a simple circuit structure.SOLUTION: A current detection amplifier is configured to have a second diode 16 to be a conduction state whereas a first diode 15 to be a non-conduction state, caused by an electric potential difference generated at a current detection resistor 20, and when becoming a state that a current inflow from an output stage of a first current mirror circuit 41 to the first diode 15 is blocked, to bypass the current at the output stage of the first current mirror circuit 41 to the ground through a shunt P-type MOS transistor 7 and a second current mirror circuit 42, so as to cancel a gain error which is produced by a source current inflow of a second N-type MOS transistor 2 into a voltage generation resistor 23.SELECTED DRAWING: Figure 1
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Inventors:
Kazuyuki Miyajima
Application Number:
JP2017073521A
Publication Date:
November 24, 2021
Filing Date:
April 03, 2017
Export Citation:
Assignee:
New Japan Radio Co., Ltd.
International Classes:
H03F3/45
Domestic Patent References:
| JP2016201646A | ||||
| JP9311147A | ||||
| JP2014239332A |
Foreign References:
| US20150219690 | ||||
| US20020180489 | ||||
| US20060261884 | ||||
| CN105675958A |
Attorney, Agent or Firm:
Tsutomu Azumako
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