Invention Grant
- Patent Title: Long hold time sample and hold circuits
- Patent Title (中): 长保持时间采样和保持电路
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Application No.: US10719645Application Date: 2003-11-21
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Publication No.: US07773332B2Publication Date: 2010-08-10
- Inventor: Jonathan H. Fischer , Michael P. Straub
- Applicant: Jonathan H. Fischer , Michael P. Straub
- Applicant Address: US PA Allentown
- Assignee: Agere Systems Inc.
- Current Assignee: Agere Systems Inc.
- Current Assignee Address: US PA Allentown
- Agency: Ryan, Mason & Lewis, LLP
- Main IPC: G11B5/02
- IPC: G11B5/02 ; G11C27/02
Abstract:
A sample and hold circuit is disclosed that provides longer hold times. The sample and hold circuit can be used in a disc drive to provide improved read-to-write and write-to-read mode transitions. The sample and hold circuit has an input and an output, and includes at least one capacitive element for retaining a charge. The capacitive element is connected to a node between the input and the output. The sample and hold circuit includes at least one input switch to selectively connect the capacitive element to the input and at least one output switch to selectively connect the capacitive element to the output. In addition, an amplifier is connected to the node and has an offset voltage. In this manner, a voltage drop across at least one of the input and output switches is limited to the offset voltage.
Public/Granted literature
- US20050111128A1 Long hold time sample and hold circuits Public/Granted day:2005-05-26
Information query
IPC分类:
