Abstract: Provided is a homopiperazine compound for inhibiting ribosomal frameshifting by binding to an RNA pseudoknot structure of SARS coronavirus. Particularly, the present invention provides a pharmaceutical composition for inhibiting synthesis of protein induced by ?1 frameshifting by binding to an RNA pseudoknot structure specifically existing in SARS coronavirus. The composition includes a therapeutically effective amount of homopiperazine compound of following chemical formula 1 or a pharmaceutically accepted salt thereof, and a pharmaceutically accepted carrier or excipient.

Abstract: Provided is a homopiperazine compound for inhibiting ribosomal frameshifting by binding to an RNA pseudoknot structure of SARS coronavirus. Particularly, the present invention provides a pharmaceutical composition for inhibiting synthesis of protein induced by ?1 frameshifting by binding to an RNA pseudoknot structure specifically existing in SARS coronavirus. The composition includes a therapeutically effective amount of homopiperazine compound of following chemical formula 1 or a pharmaceutically accepted salt thereof, and a pharmaceutically accepted carrier or excipient.

Abstract: Disclosed is a semiconductor device comprising a reference circuit for receiving a plurality of impedance control signals and generating a reference voltage, a transmission driving circuit for receiving the impedance control signals and a pair of differential input signals and outputting a pair of differential output signals to an external cable, and an impedance control signal generating circuit for receiving a difference signal of the differential output signals and the reference voltage and generating the impedance control signals.

Abstract: Disclosed is a semiconductor device comprising a reference circuit for receiving a plurality of impedance control signals and generating a reference voltage, a transmission driving circuit for receiving the impedance control signals and a pair of differential input signals and outputting a pair of differential output signals to an external cable, and an impedance control signal generating circuit for receiving a difference signal of the differential output signals and the reference voltage and generating the impedance control signals.

Abstract: In a semiconductor integrated circuit, an internal passive circuit element value, such as a resistance, is permanently configured to a desired value by selectively fusing one or more fusing elements in response to corresponding input signals. An internal monitor circuit determines whether or not all of the requested fusing operations were successfully completed and, if so, permanently inhibits any further fusing operations. The circuit has the advantage of obviating external measurement of the adjusted circuit element value and further obviates the need for application of a lock input signal to inhibit further fusing operations. Accordingly, testing is simplified and the number of external pins is reduced.

Abstract: An FM detecting circuit using phase locked loop (PLL) is disclosed. A reference voltage unit generates a reference voltage. A phase detector detects a phase difference between an FM signal and another frequency signal. A low-pass filter receives the output signal from the phase detector, and outputs a detected signal by passing only low frequency signals. A DC component detector receives the output signal from the low-pass filter, and detects a DC component. A voltage controlled amplifier receives the reference voltage and the voltage output from the DC component detector, and outputs a constant level voltage by controlling a gain based upon the difference between the two received voltages.