Title:
COMPARATOR, AD CONVERTER, SOLID STATE IMAGING DEVICE, ELECTRONIC APPARATUS, AND COMPARATOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/037901
Kind Code:
A1
Abstract:
The present disclosure relates to a comparator, an AD converter, a solid-state imaging device, an electronic apparatus, and a comparator control method with which it is possible to reduce the power consumption while improving the determination speed of the comparator. A comparison circuit provided with: a differential input circuit operating with a first power supply voltage, for outputting a signal when the voltage of an input signal is higher than the voltage of a reference signal; a positive feedback circuit operating with a second power supply voltage lower than the first power supply voltage, for accelerating a transition speed, on the basis of an output signal from the differential input circuit, when a comparison result signal indicating the result of comparison of the voltages of the input signal and reference signal is inverted; and a voltage conversion circuit for converting the output signal of the differential input circuit to a signal that corresponds to the second power supply voltage. The comparison circuit is configured so that the source voltage of the differential input circuit is lower than 0 V. The present disclosure can be applied to, for example, a ADC or the like that is arranged for each pixel of a solid-state imaging device.
Inventors:
SAKAKIBARA MASAKI (JP)
Application Number:
PCT/JP2017/028673
Publication Date:
March 01, 2018
Filing Date:
August 08, 2017
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H04N5/3745; H03K5/08; H03K19/0185; H04N5/378
Domestic Patent References:
| WO2016009832A1 | 2016-01-21 |
Foreign References:
| JP2010109937A | 2010-05-13 | |||
| JP2015139081A | 2015-07-30 |
Other References:
See also references of EP 3503535A4
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
Download PDF: