Realtek Semiconductor Inc.

Li-Chen Liu

Leaf Chen

Yueh-Hsing Huang

Chun-Hsi Huang

Ya-Hsuan Sung

A voltage monitoring system includes a voltage dividing circuit and a voltage monitoring device. The voltage dividing circuit is configured to divide a power signal to generate an input voltage. The voltage monitoring device includes an input node, a shunt circuit, a first detection circuit and a second detection circuit. The input node receives the input voltage. The shunt circuit is configured to compare the input voltage with a voltage threshold value to selectively operate in a conducted state or a switched-off state, and configured to output a flag signal to indicate the conducted state or the switched-off state of the shunt circuit. The first detection circuit generates a first detection signal corresponding to the input voltage. The second detection circuit generates a second detection signal corresponding to the power signal according to the flag signal and the first detection signal.

Voltage monitoring system, voltage monitoring device and voltage monitoring method

A circuit chip with power supply noise rejection includes a switch unit, an energy storage unit, and an operating circuit. The switch unit has a first connection terminal and a second connection terminal. The first connection terminal is adapted to receive a power supply voltage. The switch unit is configured to selectively turn on a first connection path between the first connection terminal and the second connection terminal according to a clock signal. The energy storage unit is coupled to the second connection terminal. When the switch unit turns on the first connection path, the energy storage unit is configured to generate a storage voltage on the second connection terminal according to the power supply voltage. The operating circuit is coupled to the second connection terminal, and the operating circuit is configured to operate according to the storage voltage.

Circuit chip with power supply noise rejection

A switching device includes a first switch and a threshold voltage adjustment circuitry. The first switch is configured to be selectively turned on according to an enable signal, in order to connect a first pin to a second pin. The threshold voltage adjustment circuitry is configured to adjust a voltage level of a bulk terminal of the first switch according to the enable signal and a voltage provided from a power source. In response to the voltage being de-asserted, the threshold voltage adjustment circuitry is further configured to cut off a signal path between the bulk terminal and the power source.

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Hsinchu, Taiwan

Li-Chen Liu