Title:
COMB LINE FILTER CIRCUIT
Document Type and Number:
Japanese Patent JPH04365291
Kind Code:
A
Abstract:
PURPOSE: To obtain the comb line filter circuit unnecessitating adjustment with simple configuration.
CONSTITUTION: A composite video signal passing through a 1H delay line 3 and an AGC amplifier 5 and a composite video signal not passing them are added by an adder 4. The output of a multiplier 15 to multiply a color burst signal contained in the output of this adder 4 and a color burst signal contained in the source composite video signal is fed back to the AGC amplifier 5, and the gain is controlled. Thus, the degradation of comb line characteristic caused by dispersion in the inserting loss of the 1H delay line 3 can be prevented with no adjustment.
Inventors:
UGAKI HIDEHIRO
HOSOYA NOBUKAZU
HOSOYA NOBUKAZU
Application Number:
JP14196791A
Publication Date:
December 17, 1992
Filing Date:
June 13, 1991
Export Citation:
Assignee:
SANYO ELECTRIC CO
International Classes:
H03H15/00; H04N9/78; (IPC1-7): H03H15/00; H04N9/78
Domestic Patent References:
| JPH01181212A | 1989-07-19 | |||
| JPS6267989A | 1987-03-27 | |||
| JPS5890780U | 1983-06-20 |
Attorney, Agent or Firm:
Koji Yasutomi (1 person outside)