Invention Grant
US08493156B2 High amplitude voltage-controlled oscillator with dynamic bias circuit
有权
具有动态偏置电路的高幅度压控振荡器
- Patent Title: High amplitude voltage-controlled oscillator with dynamic bias circuit
- Patent Title (中): 具有动态偏置电路的高幅度压控振荡器
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Application No.: US13154314Application Date: 2011-06-06
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Publication No.: US08493156B2Publication Date: 2013-07-23
- Inventor: Zhiheng Cao
- Applicant: Zhiheng Cao
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Farjami & Farjami LLP
- Main IPC: H03B5/12
- IPC: H03B5/12 ; H03L5/00

Abstract:
According to an exemplary embodiment, a high amplitude oscillation generator includes an LC tank circuit, a gain stage, a dynamic bias circuit, a bias current source, and a dynamic bias circuit receiving a current source feedback voltage and outputting a gain stage bias voltage. The dynamic bias circuit adjusts the gain stage bias voltage in response to a change in the current source feedback voltage after a start up of the LC tank circuit. The dynamic bias circuit thereby increases an amplitude of oscillations produced by the oscillation generator. The dynamic bias circuit can include an error amplifier, the error amplifier generating the gain stage bias voltage responsive to the current source feedback voltage. The current source feedback voltage can change with a voltage drop across the bias current source. The current source feedback voltage can also be received from an output of the oscillation generator.
Public/Granted literature
- US20120306584A1 High Amplitude Voltage-Controlled Oscillator with Dynamic Bias Circuit Public/Granted day:2012-12-06
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