Driver circuit and imaging device
AssigneeSony Semiconductor Solutions Corporation
InventorMasahiro Ichihashi
Life of this patent
Estimating the term…
Abstract
To reduce power consumption of a driver circuit used in a vertical drive circuit of an image processing device. In the driver circuit, a drive signal output circuit outputs a drive signal in accordance with a predetermined trigger signal. Furthermore, at a time of rising of the drive signal, a step-up switch sequentially selects a plurality of voltages in ascending order, and supplies the selected voltage to the drive signal output circuit. Moreover, at a time of falling of the drive signal, a step-down switch sequentially selects a plurality of voltages in descending order, and supplies the selected voltage to the drive signal output circuit.
Claims9
A driver circuit, comprising:
- a drive signal output circuit configured to output a drive signal based on with a trigger signal;
- a step-up switch configured to sequentially select a first plurality of voltages in ascending order and supply a selected voltage of the first plurality of voltages to the drive signal output circuit, at a time of rising of the drive signal;
- a step-down switch configured to sequentially select a second plurality of voltages in descending order and supply a selected voltage of the second plurality of voltages to the drive signal output circuit, at a time of falling of the drive signal;
- and
- a current control bias circuit configured to control a current flowing through transistors included in the step-up switch and the step-down switch.
An imaging device, comprising:
- a pixel region which includes a plurality of imaging elements;
- and
- a plurality of driver circuits including, individually corresponding to the plurality of imaging elements,
- a drive signal output circuit configured to output a drive signal to each of the plurality of imaging elements based on with a trigger signal,
- a step-up switch configured to sequentially select a first plurality of voltages in ascending order to supply to the drive signal output circuit at a time of rising of the drive signal,
- a step-down switch configured to sequentially select a second plurality of voltages in descending order to supply to the drive signal output circuit at a time of falling of the drive signal, and
- a current control bias circuit configured to control a current flowing through transistors included in the step-up switch and the step-down switch.
Dependencies are inferred from the claim text.