Title:
DATA IDENTIFICATION DEVICE AND ERROR MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/116696
Kind Code:
A1
Abstract:
It is an object to provide a data identification device and an error measurement
device which are not necessary for processing of a phase continuous sweep, which
can set a clock phase to the most suitable state with respect to a data signal, and
which keep the most suitable state for a long time. The data identification device
is comprised of a delay circuit (34) which delays a data signal (Dc) output from
an identifying circuit (31) by one bit, a first phase detector (35) for detecting
a phase difference between a data signal (Db) input to the identifying circuit
(31) and the data signal (Dc) output from the identifying circuit (31), a second
phase detector (36) for detecting a phase difference between the data signal
(Dc) output from the identifying circuit (31) and the data signal (Dd) output
from the delay circuit (34), a third phase detector (37) for outputting a voltage
which is a base with respect to output values of the first and second phase detectors(35)
and (36), and a phase control means (38) for controlling a phase of a variable delay
circuit (32) so that an output value (P1) of the first phase detector (35) is made
to be equal to an intermediate value between an output value (P2) of the second
phase detector (36) and a basic voltage (P3) of the second phase detector (36).
Inventors:
FUJINUMA KAZUHIRO
YAMANE KAZUHIRO
YAMANE KAZUHIRO
Application Number:
PCT/JP2007/056242
Publication Date:
October 18, 2007
Filing Date:
March 26, 2007
Export Citation:
Assignee:
ANRITSU CORP (JP)
FUJINUMA KAZUHIRO
YAMANE KAZUHIRO
FUJINUMA KAZUHIRO
YAMANE KAZUHIRO
International Classes:
H04L7/02; H04L25/03
Foreign References:
| JPH0677785A | 1994-03-18 | |||
| JPH0888625A | 1996-04-02 |
Attorney, Agent or Firm:
ARIGA, Gunichiro (2-4-9 Yoyogi,,Shibuya-ku, Tokyo 53, JP)
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