Title:
DELTA-SIGMA MODULATOR
Document Type and Number:
WIPO Patent Application WO/2012/035674
Kind Code:
A1
Abstract:
In this delta-sigma modulator, one or more (41, 42) of a plurality of integrators (41 to 45) use variable-gain differential amplifiers (46, 47) with variable open-loop gain and the remaining integrators (43 to 45) use fixed-gain differential amplifiers (48 to 50) with fixed open-loop gain. This delta-sigma modulator is provided with open-loop-gain control means (62 and 63) that determine whether or not resonance is occurring, and if resonance is determined to be occurring, control the variable-gain differential amplifier(s) (46 and 47) so as to decrease the open-loop gain(s) thereof.
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Inventors:
SAGISAKA MASAHIKO
ADACHI HISASHI
ADACHI HISASHI
Application Number:
PCT/JP2011/000347
Publication Date:
March 22, 2012
Filing Date:
January 24, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
SAGISAKA MASAHIKO
ADACHI HISASHI
SAGISAKA MASAHIKO
ADACHI HISASHI
International Classes:
H03M3/02
Foreign References:
| JP2008054099A | 2008-03-06 | |||
| JP2009200709A | 2009-09-03 | |||
| JP2002237729A | 2002-08-23 | |||
| JP2005184337A | 2005-07-07 | |||
| JP2010074636A | 2010-04-02 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)
Patent business corporation Owner old patent firm (JP)
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