Title:
MOS VARIABLE GAIN AMPLIFIER
Document Type and Number:
WIPO Patent Application WO2000062419
Kind Code:
A3
Abstract:
An integrated receiver with channel selection and image rejection is substantially implemented on a single CMOS integrated circuit. A receiver front end provides programable attenuation and a programable gain low noise amplifier. LC filters integrated onto the substrate in conjunction with image reject mixers provide image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. Active filters utilize multitrack spiral inductors with shields to increase circuit Q. Frequency planning provides additional image rejection. Local oscillator signal generation methods on chip reduce distortion. A PLL generates needed out of band LO signals. Direct synthesis generates in band LO signals. PLL VCOs are centered automatically. A differential crystal oscillator provides a frequency reference. Differential signal transmission throughout the receiver is used. ESD protection is provided by a pad ring and ESD clamping structure. Shunts utilize a gate boosting at each pin to discharge ESD build up. An IF VGA utilizes distortion cancellation achieved with cross coupled differential pair amplifiers having their Vds dynamically modified in conjunction with current steering of the differential pairs sources.
More Like This:
| JP6952629 | Semiconductor device |
| JP6853251 | How to repair metal wiring |
| JP2009267128 | METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE |
Inventors:
BEHZAD ARYA A (US)
Application Number:
PCT/US2000/009842
Publication Date:
January 04, 2001
Filing Date:
April 12, 2000
Export Citation:
Assignee:
BROADCOM CORP (US)
BEHZAD ARYA A (US)
BEHZAD ARYA A (US)
International Classes:
H01L23/522; H01L27/08; H03B5/12; H03B5/36; H03D7/16; H03D7/18; H03G1/00; H03H11/12; H03J3/08; H03J3/18; H03L7/10; H03L7/23; H01F17/00; (IPC1-7): H03G1/00
Domestic Patent References:
| WO1997032393A1 | 1997-09-04 |
Foreign References:
| US5587688A | 1996-12-24 | |||
| EP0365085A2 | 1990-04-25 |
Download PDF:
Previous Patent: PREDISTORTION GENERATOR COUPLED WITH AN RF AMPLIFIER
Next Patent: RF TRANSFORMER WITH COMPENSATION TRANSMISSION LINE
Next Patent: RF TRANSFORMER WITH COMPENSATION TRANSMISSION LINE