Invention Grant
US07898337B2 High slew rate amplifier, analog-to-digital converter using same, CMOS imager using the analog-to-digital converter and related methods
有权
高压摆率放大器，使用模数转换器，使用模数转换器的CMOS成像器及相关方法
- Patent Title: High slew rate amplifier, analog-to-digital converter using same, CMOS imager using the analog-to-digital converter and related methods
- Patent Title (中): 高压摆率放大器，使用模数转换器，使用模数转换器的CMOS成像器及相关方法
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Application No.: US12498973Application Date: 2009-07-07
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Publication No.: US07898337B2Publication Date: 2011-03-01
- Inventor: Taehee Cho
- Applicant: Taehee Cho
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Agency: Dorsey & Whitney LLP
- Main IPC: H03F1/34
- IPC: H03F1/34
Abstract:
An amplifier, which may be used in a pipelined analog-to-digital converter, includes a first amplifier stage driving a second amplifier stage. At least one compensation capacitor is coupled to provide negative feedback through the capacitor from the second amplifier stage to the first amplifier stage. The slew rate of the amplifier is enhanced by substantially reducing the negative feedback coupled through the capacitor during a period following the transition of a signal applied to an input terminal of the amplifier. If the first stage of the amplifier has complementary signal nodes, the negative feedback coupled through the capacitor may be reduced, for example, by closing a switch coupled between first and second complementary nodes of the first amplifier stage.
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