Etron Technology, Inc.

Yi-Hao Chang

Yen-An Chang

Der-Min Yuan

Shih-Hsing Wang

Peng-Yu Chen

Wen-Tung Yang

A multi-input low dropout regulator includes an amplifier, a first metal-oxide-semiconductor transistor, and a resistor. The amplifier has a plurality of first input terminals, a second input terminal, and an output terminal. Each first input terminal of the plurality of first input terminals is used for receiving an internal voltage. The first metal-oxide-semiconductor transistor has a first terminal for receiving a first voltage, a second terminal coupled to the output terminal of the amplifier, and a third terminal coupled the second input terminal of the amplifier. The resistor has a first terminal coupled to the third terminal of the first metal-oxide-semiconductor transistor, and a second terminal for receiving a second voltage. The third terminal of the first metal-oxide-semiconductor transistor is further used for coupling to a monitor pad, and the monitor pad is used for outputting the internal voltage.

Multi-input low dropout regulator

An initial voltage generation circuit includes a reference voltage generator, a reference voltage selector, at least one initial voltage level regulator, and a plurality of stabilization capacitors. The reference voltage generator generates a plurality of reference voltage candidate groups. The reference voltage selector includes a plurality of selection switch groups and a plurality of switch control circuits. Each selection switch group includes a plurality of parallel switches. Each switch control circuit corresponds to a selection switch group for generating a switch signal to control the selection switch group to output a reference voltage candidate of a corresponding reference voltage candidate group. Each initial voltage level regulator generates an inner reference voltage according to a power-up signal, and a stabilization capacitor corresponding to the initial voltage level regulator is used for stabilizing the inner reference voltage.

Initial voltage generation circuit and method of generating an initial voltage

An input receiver includes a first input receiving unit, a second input receiving unit, a delay unit, and a first logic unit. The first input receiving unit receives an inverse wake-up signal, an external clock enable signal, a first voltage, and a reference signal, and then generates a first enable signal according to the external clock enable signal and the reference signal. The second input receiving unit receives the external clock enable signal, the first voltage, and an inverse enable voltage, and then generates a second enable signal as its output according to the external clock enable signal. The delay unit generates a wake-up signal according to the second enable signal. The first logic unit receives the wake-up signal and the first enable signal, and then generates an internal clock enable signal according to the wake-up signal and the first enable signal.

Input receiver and operation method thereof

A chip testing circuit is disclosed. The chip testing circuit uses a judging circuit to switch the connection of the data compressing circuit between data compressing base units which compresses 4 XIOs, so as to obtain testing data by one single interface circuit and to increase the testing throughput.

Growing community of inventors

Hsinchu, Taiwan

Yi-Hao Chang