Invention Grant
US08487693B2 Self calibrated, broadband, tunable, active oscillator with unity gain cells for multi-standard and/or multiband channel selection
失效
自校准，宽带，可调谐，具有单位增益单元的主动振荡器，用于多标准和/或多频段通道选择
- Patent Title: Self calibrated, broadband, tunable, active oscillator with unity gain cells for multi-standard and/or multiband channel selection
- Patent Title (中): 自校准，宽带，可调谐，具有单位增益单元的主动振荡器，用于多标准和/或多频段通道选择
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Application No.: US13648799Application Date: 2012-10-10
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Publication No.: US08487693B2Publication Date: 2013-07-16
- Inventor: Mihai Adrian Tiberiu Sanduleanu , Ping-Yu Chen
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Ryan, Mason & Lewis, LLP
- Agent Anne V. Dougherty
- Main IPC: H03K5/00
- IPC: H03K5/00
Abstract:
An oscillator includes N greater than unity gain amplifiers, N being at least two. Each of the N greater than unity gain amplifiers has a pair of differential input terminals and a pair of differential output terminals. The oscillator further includes a first pair of variable resistances, N−1 pairs of variable resistances, N−1 pairs of variable capacitances, and a variable capacitance. The pairs of variable resistances couple differential output terminals of the N greater than unity gain amplifiers. The pairs of variable capacitances couple differential input terminals of the N greater than unity gain amplifiers. Each of the N greater than unity gain amplifiers includes a linearized operational transconductance amplifier stage coupled to a corresponding pair of the differential input terminals, and a unity gain buffer with feedback interconnected between the linearized operational transconductance amplifier stage and a corresponding pair of the differential output terminals.
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