Qualcomm Incorporated

Prince Mathew

Ashwin Sethuram

Jeffrey Mark Hinrichs

Mostafa Naguib Abdulla

Patrick Isakanian

Chang Ki Kwon

Satish Krishnamoorthy

Anand Meruva

Jacob Schneider

Young Uk Yim

Mohammed Mizanur Rahman

Andrew Tohmc

A delay buffer includes a delay device having an input, an output, and a current terminal. The delay buffer also includes a current circuit coupled between a rail and the current terminal. The current circuit includes transistors and switches. Each one of the switches is coupled in series with a respective one of the transistors between the rail and the current terminal.

Compact digital delay locked loop

Certain aspects of the present disclosure provide methods and apparatus for equalizing a transmitter circuit for use in high-speed data links, such as in a serializer/deserializer (SerDes) scheme. One example transmitter circuit generally includes at least one driver stage, a first equalization circuit coupled to an output of the transmitter circuit, and a second equalization circuit coupled to an input of the at least one driver stage. One example method of transmitting data generally includes operating a transmit circuit comprising: at least one driver stage, a first equalization circuit coupled to an output of the transmitter circuit, and a second equalization circuit coupled to an input of the at least one driver stage; and selectively enabling at least one of the first equalization circuit or the second equalization circuit.

Equalization for a transmitter circuit

A hybrid output driver is disclosed that supports high-voltage signaling and low-voltage signaling. The high-voltage signaling is powered by a high-power supply voltage that is greater than a low-power supply voltage that powers the low-voltage signaling.

High-voltage and low-voltage signaling output driver

Growing community of inventors

San Diego, CA, United States of America

Prince Mathew