Invention Grant
- Patent Title: Fully integrated tuner architecture
- Patent Title (中): 完全集成的调谐器架构
-
Application No.: US11393899Application Date: 2006-03-31
-
Publication No.: US07423699B2Publication Date: 2008-09-09
- Inventor: Pieter Vorenkamp , Klaas Bult , Frank Carr , Christopher M. Ward , Ralph Duncan , Tom W. Kwan , James Y. C. Chang , Haideh Khorramabadi
- Applicant: Pieter Vorenkamp , Klaas Bult , Frank Carr , Christopher M. Ward , Ralph Duncan , Tom W. Kwan , James Y. C. Chang , Haideh Khorramabadi
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox PLLC
- Main IPC: H04N5/455
- IPC: H04N5/455

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 programable attenuation and a programable 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
- US20070077908A1 Fully integrated tuner architecture Public/Granted day:2007-04-05
Information query