Title:
OUTPUT FEEDBACK CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/124910
Kind Code:
A1
Abstract:
This output feedback control circuit has, as means for generating an error signal ERR between a feedback voltage FB according to the output voltage and a reference voltage REF (means substituting for a single error amplifier 140), a first signal processing unit (for example, amplifier 140a) constituting a first path, and a second signal processing unit (for example, amplifier 140b) constituting a second path. The amplifier 140a is of higher accuracy than the amplifier 140b, while the amplifier 140b is of higher speed than the amplifier 140a. A capacitor Cc apart from the parasitic elements may be connected to the output terminal of the amplifier 140a. Without a capacitor apart from the parasitic elements being connected, a resistor Rc may be connected to the output terminal of the amplifier 140b. The amplifier 140a may have a transconductance gm1, while the amplifier 140b may have a transconductance gm2 (≠gm1).
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Inventors:
TAKOBE ISAO (JP)
NAGASATO MASASHI (JP)
NAGASATO MASASHI (JP)
Application Number:
PCT/JP2020/045080
Publication Date:
June 24, 2021
Filing Date:
December 03, 2020
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H02M3/155
Foreign References:
| JP2003060934A | 2003-02-28 | |||
| JP2019009548A | 2019-01-17 | |||
| US20140107857A1 | 2014-04-17 | |||
| US7002409B1 | 2006-02-21 | |||
| US20140097902A1 | 2014-04-10 | |||
| JPH0964663A | 1997-03-07 | |||
| JP2019083686A | 2019-05-30 | |||
| US20150244262A1 | 2015-08-27 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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