Novatek Microelectronics Corp.

Po-Yao Ko

Chien-Chung Chen

Chun-Po Huang

Hsu-Yu Huang

A data receiver for a double data rate (DDR) memory includes a first stage circuit and a second stage circuit. The first stage circuit is deployed for receiving a single-ended signal from the DDR memory and converting the single-ended signal into a pair of differential signals. The second stage circuit, coupled to the first stage circuit, is deployed for receiving the differential signals from the first stage circuit and converting the differential signals into an output signal. Both of the first stage circuit and the second stage circuit are implemented in a core voltage domain.

Data receiver and controller for DDR memory

A resistor calibration system includes a reference resistor, a first control circuit, a second control circuit, a comparator, a multiplexer and a de-multiplexer. The first control circuit calibrates a first resistor and a duplicated first resistor. The second control circuit calibrates a second resistor. The comparator includes a first input terminal receiving a reference voltage, a second input terminal and an output terminal. The multiplexer includes a first input terminal coupled to the reference resistor and the first resistor, a second input terminal coupled to the duplicated first resistor and the second resistor, and an output terminal coupled to the second input terminal of the comparator. The de-multiplexer includes an input terminal coupled to the output terminal of the comparator, a first output terminal coupled to the first control circuit, and a second output terminal coupled to the second control circuit.

Resistor calibration system

A level shifter for converting a first voltage range to a second voltage range includes a latch circuit, a stack device and a dynamic bias circuit. The latch circuit is used for outputting the second voltage range. The stack device, coupled to the latch circuit, includes a stack transistor, which is used for sustaining the second voltage range of the latch circuit. The dynamic bias circuit, coupled to the stack device, is used for turning on the stack transistor to toggle the latch circuit.

Growing community of inventors

Hsinchu, Taiwan

Po-Yao Ko