Title:
FREQUENCY DETECTING DEVICE AND FREQUENCY DETECTING METHOD
Document Type and Number:
Japanese Patent JPH11142447
Kind Code:
A
Abstract:
To provide a frequency detecting device and a frequency detecting method both capable of outputting detection frequencies continuously.
A frequency deriving means 7 receives a frequency deviation A4 from a control means 3 and produces and outputs a detection frequency A8. An integrating means 5 receives a frequency signal A5 outputted by an adding means 4 and integrates it so that it coincides with periodic function signals A1-1 and A1-2 to thus produce a phase signal A6, which is outputted to periodic-function creating means 6-1 and 6-2.
Inventors:
TSUKADA MICHIHARU
AKAMATSU MASAHIKO
ITO DAISUKE
AKAMATSU MASAHIKO
ITO DAISUKE
Application Number:
JP30435697A
Publication Date:
May 28, 1999
Filing Date:
November 06, 1997
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G01R23/14; G01R23/15; (IPC1-7): G01R23/14; G01R23/15
Attorney, Agent or Firm:
Hiroaki Tazawa (1 person outside)