Linear channel select filter

Details Linear channel select filter Linear channel select filter

2007-02-13

2007-02-13

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical analog calculating computer

Particular function performed

Reexamination Certificate

active

10409076

ABSTRACT:
A linear channel select filter for an Intermediate Frequency selector of a satellite broadcasting tuner, linearly changes a desired frequency by adjusting an output current, and includes: a transconductance (GM) current cell controller for determining a control voltage according to a select signal, generating the output current according to an differential input voltage, linearly controlling the output current according to the control voltage, and providing a linearly variable resistance according to the linearly controlled output current, and a capacitor circuit coupled to the GM cell controller to provide a capacitance to generate a cutoff frequency voltage according to the output current and the variable resistance. An occupying area and a size of the filter are reduced.

REFERENCES:
patent: 4356464 (1982-10-01), Fettweis
patent: 4511992 (1985-04-01), Dureigne et al.
patent: 5612648 (1997-03-01), McClellan et al.
patent: 5931898 (1999-08-01), Khoury
patent: 5950112 (1999-09-01), Hori et al.
patent: 6424209 (2002-07-01), Gorecki et al.
patent: 2002/0153973 (2002-10-01), Allott
patent: 2003/0011429 (2003-01-01), Kizaki
patent: 0792010 (1997-08-01), None
patent: 0957578 (1999-11-01), None
patent: 1175007 (2002-01-01), None
patent: 2280999 (1995-02-01), None
patent: 11-0330906 (1999-11-01), None
Randall A. Geiger & Edgar Sanchez-Sinencio; Active Filter Design Using Operational Transconductance Amplifiers: A Tutorial “IEEE Circuits and Devices Magazine” vol. 1; Mar. 1985; pp. 20-32.

Affiliated with

Also associated with

Rating

Linear channel select filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Linear channel select filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear channel select filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3853745