发明名称 |
A high-pass filter, particularly for cancelling out the offset in a chain of amplifiers |
摘要 |
<p>The high-pass filter described comprises at least one circuit unit constituted by a first branch (A) and a second branch (B) both connected to an input (IN) of the filter on one side and, on the other side, to an adder (OP) the output of which is the output (OUT) of the filter. The first branch (A) comprises means (Rff) for transferring an input signal substantially without modifying its frequency content, and the second branch (B) comprises a low-pass filter (Rsc, C'fil). The whole is of dimensions such that the components of the input signal with frequencies below the cut-off frequency of the low-pass filter are substantially cancelled out at the output of the adder. The filter is suitable for being produced within a particularly small area in an integrated circuit. <IMAGE></p> |
申请公布号 |
EP0744829(A1) |
申请公布日期 |
1996.11.27 |
申请号 |
EP19950830217 |
申请日期 |
1995.05.22 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
TOMASINI, LUCIANO;CASTELLO, RINALDO;BIETTI, IVAN;CLERICI, GIANCARLO |
分类号 |
H03F3/45;(IPC1-7):H03H1/00 |
主分类号 |
H03F3/45 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|