RGB encoder for converting digital signals to analog signals and activating deactivating D/A converters according to a mode signal
AssigneeRohm Co., Ltd.
InventorsMasahito Kondo, Kyoji Marumoto
Life of this patent
Estimating the term…
Abstract
An encoder converts digital RGB signals into analog television signals. This encoder forms digital composite, luminance and chrominance signals based on digital signals input through an RGB input terminal. The encoder has a first, a second and a third D/A converters for converting digital composite, luminance and chrominance signals into corresponding analog signals. The encoder is provided with a switch for activating required ones of the three D/A converters and deactivating others of the D/A converters.
Claims8
An encoder for converting digital RGB signals into analog television signals, comprising;
- RGB input terminals;
- a circuit for forming digital composite, luminance and chrominance signals based on R, G and B digital signals input through said RGB input terminals;
- a first, a second and a third D/A converters for converting said digital composite, luminance and chrominance signals into corresponding analog signals;
- a first, a second and a third output terminals for outputting an analog-converted composite, luminance and chrominance signals, respectively;
- a mode terminal for inputting a mode signal;
- and
- a selecting circuit for activating required ones of said D/A converters and deactivating others of said D/A converter according to said mode signal.
An electronic appliance including an encoder for converting digital RGB signals into analog television signals,
- wherein said encoder comprises:
- RGB input terminals;
- a circuit for forming digital composite, luminance and chrominance signals based on R, G and B digital signals input through said RGB input terminals;
- a first, a second and a third D/A converters for converting said digital composite, luminance and chrominance signals into corresponding analog signals;
- a first, a second and a third output terminals for outputting an analog-converted composite, luminance and chrominance signals, respectively;
- a mode terminal for inputting a mode signal;
- and
- a selecting circuit for activating required ones of said D/A converters and deactivating others of said D/A converters according to said mode signal.
Dependencies are inferred from the claim text.