System General Corporation

Semiconductor Components Industries, LLC

Food Industry Research and Development Institute

Meng-Jen Tsai

Chien-Yuan Lin

Wei-Hsuan Huang

Chuan-Chang Li

Gwo-Hwa Wang

Ming-Chang Tsou

Rui-Hong Lu

Chiu-Chih Chiang

Chiou-Yen Wen

Cheng-Chi Hsueh

Chao-Chih Lin

Jen-Tao Chen

Ho-Tzu Chueh

Fang-Hwa Sheu

A start-up circuit to discharge EMI filter is developed for power saving. It includes a detection circuit detecting a power source for generating a sample signal. A sample circuit is coupled to the detection circuit for generating a reset signal in response to the sample signal. The reset signal is utilized for discharging a stored voltage of the EMI filter.

Start-up circuit to discharge EMI filter for power saving of power supplies

The power supply according to the present invention comprises a transformer, a power switch, a signal generating circuit, an on-time detection circuit, and a delay circuit. The transformer receives an input voltage and generates an output voltage. The power switch switches the transformer for regulating the output voltage. The signal generating circuit generates a switching signal for controlling switching of the power switch. The on-time detection circuit detects an on-time of the power switch and generates a short-circuit signal. The delay circuit counts to a first delay time or to a second delay time in response to a feedback signal of the power supply and the short-circuit signal to generate a turn off signal for controlling the signal generating circuit to latch the switching signal.

Power supply with open-loop protection and short-circuit protection

A control circuit with protection circuit for power supply according to the present invention comprises a peak-detection circuit and a protection circuit. The peak-detection circuit detects an AC input voltage and generates a peak-detection signal. The protection circuit generates a reset signal to reduce the output of the power supply in response to the peak-detection signal. The present invention can protect the power supply in response to the AC input voltage effectively through the peak-detection circuit.

Control circuit with protection circuit for power supply

Disclosed herein is a method of reducing the purine content of an edible material, including treating an edible material having a first level of purine content with a microorganism capable of digesting purine compounds, such that the thus treated edible material has a second level of purine content lower than the first level of purine content, wherein the microorganism is selected fromATCC 11493,ATCC 26850,ATCC 44193,ATCC 26831,ATCC 52362, and combinations thereof. An edible material obtained from the aforementioned method is also disclosed.

Method of reducing the purine content of an edible material

A power supply with an open-loop protection according to the present invention comprises a transformer, a switch, a signal generation circuit, a feedback detection circuit, a brown-out detection circuit, and a delay circuit. The transformer receives an input voltage. The switch is coupled to the transformer for switching the transformer. The signal generation circuit generates a switching signal to control the switch. The feedback detection circuit generates a pull-high signal in response to a feedback signal of the power supply. The brown-out detection circuit generates a delay signal in response to the pull-high signal and the input voltage. The delay circuit counts a delay time in response to the delay signal for generating a disabling signal coupled to the signal generation circuit to latch the switching signal. The brown-out detection circuit is utilized to detect whether the input voltage is in the brown-out condition for determining whether the open-loop protection is executed.

Power supply with open-loop protection

Growing community of inventors

Hsinchu, Taiwan

Meng-Jen Tsai