Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.

Abstract: An output circuit includes a differential amplifier including an inverting input terminal, non-inverting input terminals and an output terminal, and outputs, from the output terminal, a voltage having a level corresponding to a weighted average of respective input voltage levels of the non-inverting input terminals, when the output voltage level is equal to a input voltage level of the inverting input terminal, and outputs a voltage having a level corresponding to a difference between a level corresponding to a weighted average of the respective input voltage levels of the non-inverting input terminals and the input voltage level, when which the output voltage level is different from the input voltage level; and a delay circuit that generates a delay voltage responding with a predetermined time constant with respect to a change in the output voltage level and supplies the delay voltage to the inverting input terminal.

Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.

Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.

Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.

Abstract: An output circuit includes: a differential amplifier including inverting input terminal, non-inverting input terminals and output terminal, and outputs, form the output terminal, a voltage having a level corresponding to a weighted average of respective input voltage levels of the non-inverting input terminals, when the output voltage level is equal to a input voltage level of the inverting input terminal, and outputs a voltage having a level corresponding to a difference between a level corresponding to a weighted average of the respective input voltage levels of the non-inverting input terminals and the input voltage level, when which the output voltage level is different from the input voltage level; and a delay circuit that generates a delay voltage responding with a predetermined time constant with respect to a change in the output voltage level and supplies the delay voltage to the inverting input terminal.

Abstract: A semiconductor device is composed of a first IC chip having a data processing function and a second IC chip having a non-volatile memory for storing confidential reference data. Both of the IC chips are provided with connection pads on the facing sides of the two chips, so that they can be bonded in a chip-on-chip configuration. Each of the connection pads of the second IC chip is located at the position of a corresponding connection pad of the first IC chip. An externally input data is compared with the reference data for verification. The input data is authenticated based on the result of the verification.

Abstract: A circuit for driving a liquid crystal display includes decoders for receiving input data to display, and output amplifiers correspondingly connected to the decoders for selectively driving display cells. In each output amplifier, the gate electrodes of a first transistor forming one input of a differential amplifier and a second transistor larger than the first transistor are selectively connected or disconnected when input data changes logical state. The drain electrodes of a third transistor forming the other input of the differential amplifier and a fourth transistor larger than the third transistor are selectively connected or disconnected when the input data changes logical state. The differential amplifier output is selectively fed back to the second transistor to charge or discharge the second transistor. Delay on the output of the decoders is reduced to thereby minimize delay on the output of the output amplifiers.

Abstract: A semiconductor device is composed of a first IC chip having a data processing function and a second IC chip having a non-volatile memory for storing confidential reference data. Both of the IC chips are provided with connection pads on the facing sides of the two chips, so that they can be bonded in a chip-on-chip configuration. Each of the connection pads of the second IC chip is located at the position of a corresponding connection pad of the first IC chip. An externally input data is compared with the reference data for verification. The input data is authenticated based on the result of the verification.

Abstract: To eliminate or suppress the effect of inductance from changes in signal electrode potential on scan electrode potential due to liquid crystal static capacitance, dummy electrodes DH, DM, and DL have virtually the same construction as a scan electrode X, and are crossed with signal electrodes Y1.about.YM, sandwiching the liquid crystal. The output terminals of operational amplifiers 20, 22, and 24 are respectively coupled to dummy electrodes DH, DM, and DL through output buffer transistors 26H, 26M, and 26L, while at the same time being coupled to each scan electrode X.sub.i through output buffer transistor 28H(i), 28M(i), and 28L(i). Dummy electrodes DH, DM, and DL are respectively coupled to the inverting input terminals of operational amplifiers 20, 22, and 24.

Abstract: An LCD driving circuit which reduces the effective voltage difference of the applied voltage waveform between different pixels and suppresses crosstalk. The LCD panel has a single matrix LCD panel 10; scan electrode drive circuit 12, and signal electrode drive circuit 14 for driving scan electrodes X and signal electrodes Y, respectively, of the LCD panel 10; controller 16 for controlling the two drive circuits 12 and 14; level shifter 17 for shifting the level of the signal from controller 16 with respect to scan electrode drive circuit 12; and host computer 18 for feeding image data VD and timing signal TS to controller 16. Controller 16 is made of scan selection control unit 20 and display control unit 22. Selection order decision circuit 26 of scan selection control unit 20 determines the order of scan electrodes X on which the selection scan voltage is to be applied in an interval shorter or longer than an alternation period by means of line alternation operation.