Circuits with multiple controlled gain elements

Details Circuits with multiple controlled gain elements Circuits with multiple controlled gain elements

H - Electricity

04

B

328/169, 330/39

H04B 3/04 (2006.01) H03G 3/20 (2006.01) H04L 25/04 (2006.01)

Patent

CA 1301860

- 1 - Abstract: An automatic cable equalizer is implemented in CMOS technology with a reduced requirement for off-chip components. A continuously-variable gain control resistor of an AGC circuit in a gain section and two additional continuously-variable gain control resistors in a shaping section of the equalizer are driven by monotonically related control voltages which are derived from a single feedback loop section by the use of an inverter and a pair of inverters with voltage offset. An arrangement is disclosed for realizing a detector and a filter of the gain control feedback section. Another arrangement is disclosed for realizing the inverter and the inverters with voltage offset. A third arrangement is disclosed for realizing gain control resistor networks which include the gain control resistors.

540028

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