Image-tone control circuit and gradient adjusting circuit theref

Details Image-tone control circuit and gradient adjusting circuit theref Image-tone control circuit and gradient adjusting circuit theref

1992-12-10

1995-02-21

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327170, 327 66, 327 67, 327306, H03K 512

Patent

active

053919440

ABSTRACT:
In a tone control circuit of luminance signals, an adjusting current is used to add to or subtract from input signals with a gain control. Output signals are thus controlled to have a predetermined gradient based on an arbitrary output setting voltage against the input signals, and an input-output characteristic represented by an arbitrary line graph is obtained by plural gradient adjusting circuits.

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patent: 5223927 (1993-06-01), Kageyama et al.
patent: 5258658 (1993-11-01), Morikawa
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