Title:
SENSOR OUTPUT AMPLIFICATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/155217
Kind Code:
A1
Abstract:
Provided is a sensor output amplification circuit (100) of which the amplification characteristics are provided with a temperature characteristic to increase (or decrease) the amplification factor in a desired temperature range. The sensor output amplification circuit (100) is provided with a sensor (1), an operational amplifier (2) having a plus input terminal, a minus input terminal, and an output terminal, a first resistor element (3), and a second resistor element (4). The output of the sensor (1) is connected to the plus input terminal of the operational amplifier (2). The first resistor element (3) is inserted between the minus input terminal of the operational amplifier (2) and ground. The second resistor element (4) is inserted between the output terminal and the minus input terminal of the operational amplifier (2) to configure a non-inverting amplification circuit. A first negative characteristic thermistor element (5) is connected in series with the first resistor element (3). A second negative characteristic thermistor element (6) is connected in parallel with the second resistor element (4).
Inventors:
KITAMURA AKIHIRO (JP)
Application Number:
PCT/JP2018/004488
Publication Date:
August 30, 2018
Filing Date:
February 08, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03F1/30; H03F3/45
Foreign References:
| JP2007081530A | 2007-03-29 | |||
| JP2003017947A | 2003-01-17 | |||
| JP2005099047A | 2005-04-14 | |||
| JPH09222326A | 1997-08-26 | |||
| JPS6396485U | 1988-06-22 |
Attorney, Agent or Firm:
KAWAMOTO, Takashi (JP)
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