Invention Grant
US08681838B2 Electronic device with VCO pulling compensation circuit for an input baseband signal and associated methods
有权
具有VCO拉电阻的电子装置用于输入基带信号和相关方法
- Patent Title: Electronic device with VCO pulling compensation circuit for an input baseband signal and associated methods
- Patent Title (中): 具有VCO拉电阻的电子装置用于输入基带信号和相关方法
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Application No.: US13052450Application Date: 2011-03-21
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Publication No.: US08681838B2Publication Date: 2014-03-25
- Inventor: Tajinder Manku
- Applicant: Tajinder Manku
- Applicant Address: CA Waterloo, Ontario
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: CA Waterloo, Ontario
- Agency: Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- Main IPC: H04B1/38
- IPC: H04B1/38 ; H05K13/00

Abstract:
An electronic device includes a transmitter with a baseband input for a baseband signal, a mixer downstream from the baseband input, and a phase-locked loop (PLL) having a voltage controlled oscillator (VCO) and a phase detector coupled thereto, the VCO coupled to the mixer. A power amplifier is downstream from the mixer, and generates at least one aggressing signal that would otherwise generate an output pull of the VCO, causing transmit distortion on a transmit signal. A receiver is coupled to the power amplifier and has a sense input configured to receive the transmit signal. A VCO pulling compensation circuit is coupled to the baseband input and is configured to compensate the at least one baseband signal for the transmit distortion based upon the sensed transmit signal.
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