Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PASSIVE CONVERGENCE CIRCUIT
Document Type and Number:
Japanese Patent JPH0595569
Kind Code:
A
Abstract:

PURPOSE: To provide the passive convergence circuit corresponding to the multiple frequency change of a horizontally deflected frequency.

CONSTITUTION: Constant circuits 9 and 10 are provided corresponding to the respective horizontally deflected frequencies and switch circuits 8 and 11 are provided to switch these constant circuits corresponding to the horizontally deflected frequencies. In the case of executing switching, the switch circuits execute switching while overlapping ON states. Therefore, by switching circuit constants corresponding to the respective horizontally deflected frequencies, the passive convergence circuit can be realized corresponding to multiple frequencies and by switching the circuit constants while overallping the ON states, the voltage withstand of the switch circuits 8 and 11 can be lowered.


Inventors:
FUKUMA KOJI
FUNADA ETSUO
Application Number:
JP25345291A
Publication Date:
April 16, 1993
Filing Date:
October 01, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
H04N9/28; H04N17/04; (IPC1-7): H04N9/28; H04N17/04
Attorney, Agent or Firm:
Ogawa Katsuo



 
Next Patent: IMAGE MATCHING APPARATUS