07692484 is referenced by 3 patents and cites 4 patents.

An active RC filter has an op-amp and a biasing circuit arranged to bias the op-amp to set a gain bandwidth product of the op-amp according to a desired pole frequency of the filter. The biasing circuit is operable according to an output of an RC calibration circuit. The op-amp can be an OTA transconductance amplifier, and the biasing circuit can be arranged to maintain a constant product of R and transconductance at an input of the transconductance amplifier. This biasing can help to set the pole frequency more accurately and can thus reduce the need for bandwidth margin to be provided to allow for manufacturing process variations.

Title
Bandwidth calibration of active filter
Application Number
11/588107
Publication Number
7692484 (B2)
Application Date
October 26, 2006
Publication Date
April 6, 2010
Inventor
Dieter Joos
Mechelen
BE
Steven Terryn
Leuven
BE
Agent
Wolf Greenfield & Sacks P C
James H Morris
Lisa K Jorgenson
Assignee
STMicroelectronics Belgium
BE
IPC
H03K 5/00
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