Output circuit, digital/analog circuit and display apparatus

Details Output circuit, digital/analog circuit and display apparatus Output circuit, digital/analog circuit and display apparatus

2008-05-06

2008-05-06

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S145000, C341S153000, C341S154000, C348S089000, C348S090000, C348S098000, C348S100000

Reexamination Certificate

active

07369075

ABSTRACT:
An output circuit, a digital/analog conversion circuit and a display apparatus can reduce the number of required input voltages and the number of transistors to save the necessary area. The output circuit and the digital/analog conversion circuit comprise a selection circuit for receiving as input a plurality of (m) reference voltages having mutually different respective voltage values, selecting two of the voltages according to a selection signal and outputting them and an amplifier circuit for receiving as input the voltages output from the selection circuit at two input terminals T1, T2and outputting the voltage obtained by interpolating the voltage difference of the two input terminal voltages V(T1), V(T2) to a predetermined ratio. It may alternatively be so arranged that the selection circuit sequentially outputs the selected two voltages and the amplifier circuit sequentially receives as two input the two voltages and outputs the output voltage obtained by interpolation.

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