Abstract: A shift register circuit includes a plurality of bit register units, coupled in series, for transferring an input signal among the plurality of bit register units to sequentially output the input signal to a plurality of data output terminals according to a control signal and a clock signal, wherein the number of the plurality of data output terminals is greater than that of the plurality of bit register units, and a control unit for generating the control signal to control transference of the input signal.

Abstract: The present invention provides a differential signal interfacing device, including a reduced swing differential signaling (RSDS) transmitter and a plurality of RSDS receivers, in order to improve RSDS signal capacity. The RSDS transmitter is coupled to the plurality of RSDS receivers via a bus and transmits a RSDS signal in a discontinuous manner. The plurality of RSDS receivers receives the RSDS signal for signals of different types.

Abstract: A control circuit for an operational amplifier and a method thereof are provided to dynamically modulate the operational amplifier for strong driving capability and power saving. The control circuit comprises a bias unit coupled to the operational amplifier and a control unit coupled to the bias unit. The bias unit normally outputs a bias signal to bias the operational amplifier so that the operational amplifier has a first driving capability. However, when the driving capability of the operational amplifier needs to be adjusted, the control unit receives a modulating signal and outputs a control signal according to the modulating signal. When the bias unit receives the control signal, the bias unit dynamically modulates the bias signal according to the control signal, and hence the driving capability of the operational amplifier is dynamically modulated in an indirect manner.

Abstract: A sample-and-hold device including first and second capacitors, first and second switches, amplifier and feedback network is provided. The amplifier includes first and second input stages, output stage and switchable bias current source. The first switch and the first capacitor are coupled in series between input signal and first voltage, and a common node is coupled to a first positive input terminal of the amplifier. The first switch is on during first period and off during second period. The second switch and the second capacitor are coupled in series between the input signal and second voltage, and a common node is coupled to a second positive input terminal of the amplifier. The second switch is on during second period and off during first period. The switchable bias current source biases the second input stage during first period, and switches to bias the first input stage during second period.

Abstract: A sample-and-hold device including first and second capacitors, first and second switches, amplifier and feedback network is provided. The amplifier includes first and second input stages, output stage and switchable bias current source. The first switch and the first capacitor are coupled in series between input signal and first voltage, and a common node is coupled to a first positive input terminal of the amplifier. The first switch is on during first period and off during second period. The second switch and the second capacitor are coupled in series between the input signal and second voltage, and a common node is coupled to a second positive input terminal of the amplifier. The second switch is on during second period and off during first period. The switchable bias current source biases the second input stage during first period, and switches to bias the first input stage during second period.

Abstract: A control circuit for an operational amplifier and a method thereof are provided to dynamically modulate the operational amplifier for strong driving capability and power saving. The control circuit comprises a bias unit coupled to the operational amplifier and a control unit coupled to the bias unit. The bias unit normally outputs a bias signal to bias the operational amplifier so that the operational amplifier has a first driving capability. However, when the driving capability of the operational amplifier needs to be adjusted, the control unit receives a modulating signal and outputs a control signal according to the modulating signal. When the bias unit receives the control signal, the bias unit dynamically modulates the bias signal according to the control signal, and hence the driving capability of the operational amplifier is dynamically modulated in an indirect manner.

Abstract: A data transferring method for the input interface of a liquid crystal display. In the conventional reduced swing differential signal (RSDS) data transferring method, a pair of data lines can transmit a single bit of data. Thus, more data line pairs are required to transmit more data bits leading to a rapid increase in spatial occupancy and production cost. The present invention permits more data bits to be transmitted for the same number of data lines by converting DC levels into AC levels. With two DC levels provided by two pairs of data lines, a third bit of data can be transmitted. Similarly, with four DC levels provided by four pairs of data lines, seven bit data can be transmitted. Since more data can be transmitted with a given set of data lines, space and production cost is saved.