Title:
LOAD DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/082245
Kind Code:
A1
Abstract:
A load driving device able to reduce offset voltage without requiring a configuration for resetting the charge of the integrating capacitance and terminals for correcting offset. In the load driving device, an input selector selects an input signal or null signal and creates a selected input signal. An integrator integrates the selected input signal and creates an integrated signal. A load driving unit performs pulse width modulation on the integrated signal and amplifies the signal to thereby create a load driving signal. A first route is a route for returning the load driving signal. A second route is a route for returning the integrated signal. A route selector selects the first route or second route, thereby creating a feedback signal. An offset correcting signal generator creates an offset correcting signal showing the information for adjusting the integrated signal, so as to minimize the offset amount of the feedback signal. The integrator adds the feedback signal to the input selected signal, performs integration, and adjusts the integrated signal according to the offset correcting signal.
Inventors:
NAKAI TAKAYUKI
Application Number:
PCT/JP2009/005093
Publication Date:
July 22, 2010
Filing Date:
October 02, 2009
Export Citation:
Assignee:
PANASONIC CORP (JP)
NAKAI TAKAYUKI
NAKAI TAKAYUKI
International Classes:
H03K7/08
Foreign References:
| JP2007096376A | 2007-04-12 | |||
| JP2003273671A | 2003-09-26 | |||
| JPS62165281A | 1987-07-21 |
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (JP)
Mitsuo Tanaka (JP)
Mitsuo Tanaka (JP)
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