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Patent Searching and Data


Title:
AMPLIFIER AND OFFSET ADJUSTMENT METHOD FOR AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2019/193909
Kind Code:
A1
Abstract:
The present invention is provided with: a saturation determination part (1401) for determining, upon reading a voltage value of a differential signal after converted by an ADC (12), whether or not the output of the ADC (12) is saturated; a coarse adjustment part (1402) for performing coarse adjustment, when the saturation determination part (1401) has determined that the output is saturated, in order to adjust the voltage of an offset adjustment signal output by a DAC (13) such that the voltage of the differential signal after amplified by an amplification part (15) falls within the input range of the ADC (12); and a fine adjustment part (1403) for performing fine adjustment, when the saturation determination part (1401) has determined that the output is not saturated or when the coarse adjustment by the coarse adjustment part (1402) is completed, in order to adjust the voltage of the offset adjustment signal output by the DAC (13) such that an offset voltage included in the differential signal to be input to the amplification part (15) becomes equal to or lower than a target threshold value.

Inventors:
UENO, Hiroto (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 19, 〒1006419, JP)
Application Number:
JP2019/008906
Publication Date:
October 10, 2019
Filing Date:
March 06, 2019
Export Citation:
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Assignee:
AZBIL CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H03F3/34; H03F3/45
Foreign References:
JP2015012479A2015-01-19
JP2009033638A2009-02-12
JP2018050238A2018-03-29
JP2011109721A2011-06-02
JP2009200809A2009-09-03
JP2007243994A2007-09-20
JP2007208427A2007-08-16
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (Akasaka Sanno Center Bldg. 5F, 12-4 Nagata-cho 2-chome, Chiyoda-k, Tokyo 14, 〒1000014, JP)
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