Abstract: An active quadrature signal generator produces poly-phase quadrature signals necessary in high frequency transmit and receive elements of a communication system. The quadrature signals are produced using the phase difference between a load representing a low-pass filter characteristic and a load representing a high-pass filter characteristic and the quadrature signal is then used in the differential structure to produce amplified signal having 4 quadrature phases. The device can reduce a loss characteristic of the signal and additional power consumption for compensating for it in a common poly-phase quadrature filter having only conventional resistors and capacitor.

Abstract: The present invention relates to an apparatus for producing poly-phase quadrature signals necessary in the communication circuit and correcting the phase and amplitude errors. The apparatus uses a filter having high-pass and low-pass characteristics as a load of a transistor to amplify the signals and also produces quadrature phase using phase shift characteristic included in respective filters. Further, the present invention produces poly-phase quadrature signals using it as a differential structure and uses respective filter loads as a variable capacitor or a variable resistor to vary the phase and amplitude of the quadrature signal. Therefore, the present invention can reduce the loss of the signal in a common poly-phase quadrature filter having only resistors and capacitor, and additional power consumption for compensating for it.

Abstract: A process for preparing a fermentation product having superoxide dismutase (SOD) activity, which can reduce blood alcohol level and eliminate foul alcohol breath using a novel microorganism of the Bacillus species, and a beverage containing the fermentation product.