Television receiver with display driver amplifier and input vide

Details Television receiver with display driver amplifier and input vide Television receiver with display driver amplifier and input vide

1985-09-27

1987-08-25

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358181, H02N 5445

Patent

active

046896635

ABSTRACT:
A television receiver responsive to a broadcast television signal in a normal operating mode includes a television signal channel with high frequency peaking circuits, followed by a display driver to which an auxiliary video signal may be applied. A low pass filter is connected between the output of the television signal channel and the display driver, which exhibits a wide bandwidth when the receiver is intended to display auxiliary video information. The bandwidth of the low pass filter is inversely related to the bandwidth of the driver such that the low pass filter exhibits a narrow bandwidth relative to the bandwidth of a wideband display driver. In addition, the low pass filter exhibits a trapping characteristic at the second harmonic frequency of the chrominance signal in a color television receiver.

REFERENCES:
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patent: 4020501 (1977-04-01), Hillberger et al.
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patent: 4276566 (1981-06-01), Parker
patent: 4338624 (1982-07-01), d'Hautecourt et al.
patent: 4395729 (1983-07-01), Lewis, Jr.
patent: 4417270 (1983-11-01), Nagao et al.
patent: 4460918 (1984-07-01), Flasza
patent: 4591912 (1986-05-01), Belotserkovsky et al.
Color Television Service Data (1984) for RCA color television receiver CTC-131.

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