Invention Grant
- Patent Title: Ramp generator for image sensor ADC
- Patent Title (中): 用于图像传感器ADC的斜坡发生器
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Application No.: US10254443Application Date: 2002-09-25
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Publication No.: US06956413B2Publication Date: 2005-10-18
- Inventor: Toby Bailey
- Applicant: Toby Bailey
- Applicant Address: GB Buckinghamshire
- Assignee: STMicroelectronics Ltd.
- Current Assignee: STMicroelectronics Ltd.
- Current Assignee Address: GB Buckinghamshire
- Agency: Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- Agent Lisa K. Jorgenson
- Priority: EP01308309 20010928
- Main IPC: H03K4/02
- IPC: H03K4/02 ; H03K4/06
Abstract:
A ramp generator includes a resistance ladder supplied with a constant current. Switches are closed in sequence by a shift register to provide a stepped ramp output. The constant current is controlled by referencing an on-chip bandgap voltage that is used as an input to a feedback circuit controlling current through a reference resistor ladder.
Public/Granted literature
- US20030071666A1 Ramp generator for image sensor ADC Public/Granted day:2003-04-17
Information query
