Invention Grant
- Patent Title: Temperature compensation for internal inductor resistance
- Patent Title (中): 内部电感电阻的温度补偿
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Application No.: US11522454Application Date: 2006-09-18
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Publication No.: US08111095B2Publication Date: 2012-02-07
- Inventor: Pieter Vorenkamp , Klaas Bult , Frank Carr
- Applicant: Pieter Vorenkamp , Klaas Bult , Frank Carr
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H03K5/00
- IPC: H03K5/00

Abstract:
An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programmable attenuation and a programmable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator. The VCOs in the PLLs are centered using a control circuit to center the tuning capacitance range. A differential crystal oscillator is advantageously used as a frequency reference. Differential signal transmission is advantageously used throughout the receiver.
Public/Granted literature
- US20070013433A1 Temperature compensation for internal inductor resistance Public/Granted day:2007-01-18
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