Title:
【発明の名称】ユニバーサルフィルタ
Document Type and Number:
Japanese Patent JP3181588
Kind Code:
B2
Abstract:
A universal filter is provided with three inputs Vh, Vb and V1, with one output Vout, with two transconductance amplifiers Gm1, Gm2, with four capacitors mCO, (1-m)CO, CO and LCO and an amplifier K as well as a voltage follower VF. Depending on the connections of the three inputs, the universal filter takes the form of a high-pass or low-pass or band-pass filter or a trap filter or an all-pass or an otherwise active filter. Advantageously, by selection of parameters (e.g., trans-conductance, gain, scaling), the various filter characteristics like quality (Q), slope, median frequency, amplification, etc., may be adjusted. A further advantage is that the low component count of the filter provides improved reliability, reduced cost and facilitates efficient and economic fabrication in discrete or integrated circuit form.
Inventors:
Rieger, martin
Roth, Sabine
Roth, Sabine
Application Number:
JP50030292A
Publication Date:
July 03, 2001
Filing Date:
November 21, 1991
Export Citation:
Assignee:
Deutscher Thomson-Brant Geselsyaft Mitz Besien Renktel Haftung
International Classes:
H03H11/04; H03H11/12; (IPC1-7): H03H11/12
Domestic Patent References:
| JP2266710A | ||||
| JP2231809A | ||||
| JP267811A | ||||
| JP2254806A | ||||
| JP6429111A | ||||
| JP60114016A | ||||
| JP5525281A | ||||
| JP5339041A | ||||
| JP5146235U |
Attorney, Agent or Firm:
Toshio Yano (2 outside)