High-pass filter structure with programmable zeros
US5644267A · kind A · utility
4Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | May 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/0433
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high-pass filter in particular for high-frequency applications and of the type comprising at least one input terminal (IN) and at least one output terminal (OUT) between which is defined a transfer function (FdT) and is inserted a biquadratic cell (18) incorporating a series of transconductance stages (2, 3, 4, 5) comprises a generator circuit (29) of variable currents (i.sub.K1, i.sub.K2) connected between a pair of stages (2, 3) of the biquadratic cell (18) and a voltage reference (GND). Said generator allows introduction of programmable zeroes in the transfer function (FdT) of the filter (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.