Title:
OUTPUT CONDUCTANCE AUTOMATIC REGULATION CIRCUIT OF DIFFERENTIAL CURRENT OUTPUT TYPE CIRCUIT AND FILTER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2008/010331
Kind Code:
A1
Abstract:
Output conductance of a differential current output type circuit constituting
a filter body (1) and having a variable negative resistor connected between differential
output lines is automatically regulated. The output conductance automatic
regulation circuit comprises a differential voltage/current conversion circuit
(2) which is a replica of a differential voltage/current conversion circuit
constituting the filter body (1), a variable negative resistor (3) connected
between the differential output lines of the differential voltage/current
conversion circuit (2), a detector (4) for detecting the DC potential difference
between the differential output lines of the differential voltage/current
conversion circuit (2), and a controller (5) for controlling the differential
voltage/current conversion circuit (2) and the conductance of a variable negative
resistor connected with the differential voltage/current conversion circuit
constituting the filter body (1) based on the detection results from the detector
(4).
Inventors:
HORI SHINICHI (JP)
MATSUNO NORIAKI (JP)
MATSUNO NORIAKI (JP)
Application Number:
PCT/JP2007/055815
Publication Date:
January 24, 2008
Filing Date:
March 22, 2007
Export Citation:
Assignee:
NEC CORP (JP)
HORI SHINICHI (JP)
MATSUNO NORIAKI (JP)
HORI SHINICHI (JP)
MATSUNO NORIAKI (JP)
International Classes:
H03H11/10; H03H11/04
Foreign References:
| JPH06342561A | 1994-12-13 | |||
| JPH07212187A | 1995-08-11 | |||
| JPH10209810A | 1998-08-07 | |||
| JP2005348109A | 2005-12-15 |
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (16th Kowa Bldg.9-20, Akasaka 1-chom, Minato-ku Tokyo 52, JP)
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