Title:
【発明の名称】検波回路
Document Type and Number:
Japanese Patent JP2589152
Kind Code:
B2
Abstract:
A television receiver includes a correction filter (10) having an inclination characteristic opposite to a slope of a video intermediate frequency signal. The video intermediate frequency signal corrected by the correction filter is applied to a PLL circuit (11) and the PLL circuit generates a carrier signal of a video intermediate frequency locked to the video intermediate frequency signal. A synchronous detecting circuit (16) detects the video intermediate frequency signal before the correction in response to the signal outputted from the PLL circuit and outputs a video signal. At the same time, it generates a sound FM signal corresponding to a beat of the carrier signal of the video intermediate frequency and a carrier signal of a sound intermediate frequency. A sound detecting circuit (20) detects the sound FM signal and outputs a sound signal.
Inventors:
IMAIZUMI HIDEO
Application Number:
JP15176688A
Publication Date:
March 12, 1997
Filing Date:
June 20, 1988
Export Citation:
Assignee:
SANYO DENKI KK
International Classes:
H04N5/455; H03D1/22; H04N5/60; H04N5/62; (IPC1-7): H03D1/22; H04N5/455; H04N5/60
Domestic Patent References:
| JPS61258586A | ||||
| JPS61128614A |
Attorney, Agent or Firm:
Koji Yasutomi (1 person outside)