Invention Publication
- Patent Title: Controllable Temperature Coefficient Bias Circuit
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Application No.: US17987722Application Date: 2022-11-15
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Publication No.: US20230152836A1Publication Date: 2023-05-18
- Inventor: Robert Mark Englekirk , Keith Bargroff , Christopher C. Murphy , Tero Tapio Ranta
- Applicant: pSemi Corporation
- Applicant Address: US CA San Diego
- Assignee: pSemi Corporation
- Current Assignee: pSemi Corporation
- Current Assignee Address: US CA San Diego
- Main IPC: G05F3/26
- IPC: G05F3/26 ; H03M1/66 ; G05F3/24

Abstract:
A controllable temperature coefficient bias (CTCB) circuit is disclosed. The CTCB circuit can provide a bias to an amplifier. The CTCB circuit includes a variable with temperature (VWT) circuit having a reference circuit and a control circuit. The control circuit has a control output, a first current control element and a second current control element. Each current control element has a “controllable” resistance. One of the two current control elements may have a relatively high temperature coefficient and another a relatively low temperature coefficient. A controllable resistance of one of the current control elements increases when the controllable resistance of the other current control element decreases. However, the “total resistance” of the current control circuit remains constant with a constant temperature. The VWT circuit has an output with a temperature coefficient that is determined by the relative amount of current that flows through each current control element of the control circuit. A Current Digital to Analog Converter (IDAC) scales the output of the VWT and provides the scaled output to an amplifier bias input.
Public/Granted literature
- US11720136B2 Controllable temperature coefficient bias circuit Public/Granted day:2023-08-08
Information query
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