Title:
RAMP GENERATOR CIRCUIT, AND IMAGE SENSOR AND IMAGE CAPTURE DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2012/143982
Kind Code:
A1
Abstract:
A ramp generator circuit (130) comprises a reference voltage generator unit (134), which, prior to a comparison operation of an analog-digital conversion circuit (120), converts a voltage of a reference signal (Vr) to a comparison apparatus setting voltage (VR) which corrects a voltage disparity between the reference signal (Vr) and an analog input signal (Vs1-Vsn), and outputs a ramp signal as a base point of the comparison apparatus setting voltage (VR) together with the commencement of the comparison operation. The ramp generator circuit (130) further comprises a function which adds a prescribed enhanced voltage (VA) to the comparison apparatus setting voltage (VR) prior to the comparison operation.
Inventors:
HIGUCHI MASAHIRO
NISHIMURA KAZUKO
YAMAOKA YUUSUKE
ABE YUTAKA
FUJINAKA HIROSHI
NISHIMURA KAZUKO
YAMAOKA YUUSUKE
ABE YUTAKA
FUJINAKA HIROSHI
Application Number:
PCT/JP2011/004258
Publication Date:
October 26, 2012
Filing Date:
July 27, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
HIGUCHI MASAHIRO
NISHIMURA KAZUKO
YAMAOKA YUUSUKE
ABE YUTAKA
FUJINAKA HIROSHI
HIGUCHI MASAHIRO
NISHIMURA KAZUKO
YAMAOKA YUUSUKE
ABE YUTAKA
FUJINAKA HIROSHI
International Classes:
H04N5/378; H03M1/56
Domestic Patent References:
| WO2009090703A1 | 2009-07-23 |
Foreign References:
| JP2006337139A | 2006-12-14 | |||
| JPS5767433U | 1982-04-22 |
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (JP)
Hiroshi Maeda (JP)
Hiroshi Maeda (JP)
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Claims:
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