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Title:
DIFFERENCE SIGNAL TRANSFER CIRCUIT
Document Type and Number:
Japanese Patent JP2003018223
Kind Code:
A
Abstract:

To realize the most suitable operation even under the condition that the common mode of an input signal is in a wider range.

A difference signal transfer circuit which controls the common mode level of a difference signal is provided with an input common mode level detection circuit (40) which detects the common mode level of an incoming signal, two capacitors (60 and 61) coupled between the first input and output and the second input and output respectively, and a control circuit (50) which controls charging levels of the two capacitors (60 and 61) in accordance with the common mode level of the incoming signal detected by the input common mode level detection circuit (40) to control the output common mode level at an output terminal.


Inventors:
HEDBERG MATS OLOF JOAKIM
HAULIN TORD
Application Number:
JP2002135958A
Publication Date:
January 17, 2003
Filing Date:
May 10, 2002
Export Citation:
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Assignee:
ERICSSON TELEFON AB L M
International Classes:
H03F1/02; H04L25/02; H03F3/45; (IPC1-7): H04L25/02
Attorney, Agent or Firm:
Yasunori Otsuka (3 others)