Rambus Inc.

Michael D Bucher

Robert E Palmer

John M Wilson

Lei Luo

Andrew M Fuller

Brian S Leibowitz

Huy M Nguyen

Amir Amirkhany

Thomas J Giovannini

Chaofeng Huang

Thoai Thai Le

Hsuan-Jung (Bruce) Su

A first-in-first-out (FIFO) storage structure within an integrated-circuit component is loaded with qualification values corresponding to respective pairs of edges expected within a timing strobe signal transmitted to the integrated-circuit component. The qualification values are sequentially output from the FIFO storage structure during respective cycles of the timing strobe signal and a gate signal is either asserted or deasserted during the respective cycles of the timing strobe signal according to the qualification values output from the FIFO storage structure.

Signal receiver with skew-tolerant strobe gating

An integrated circuit includes a voltage regulator to supply a regulated voltage and a data output that couples to an unterminated transmission line. The circuit draws a variable amount of power from the voltage regulator according to the data. The voltage regulator includes a first current generation circuit to provide a data transition-dependent current.

On-chip regulator with variable load compensation

A controllable delay element includes a delay element to provide a variable delay from an input signal to an output signal. The variable delay can be controlled by a digital delay input. The delay element has a delay range that is controlled in response to a delay range input. The delay range of the delay element can be calibrated to a desired range of delays in response to a relative delay between a first timing reference and a second timing reference. A common timing reference is applied to a plurality of receivers and a strobe receiver. The delay through the strobe receiver is adjusted to measure the delay mismatches between the plurality of receivers. The mismatches are used to select a value for the delay through the strobe receiver.

In-situ delay element calibration

A system includes a transmitter circuit and a receiver circuit that are coupled together through transmission lines. The transmitter circuit generates an early timing signal, a nominal timing signal, and a late timing signal. A multiplexer circuit selects between the early and the late timing signals based on a data signal to generate an encoded output signal that encodes the data signal. The nominal timing signal and the encoded output signal are transmitted through the transmission lines to the receiver circuit. The receiver circuit samples the encoded output signal in response to the nominal timing signal to generate even and odd sampled data signals. Complementary timing signals can be transmitted through transmission lines on opposite sides of the encoded output signal to provide crosstalk cancellation.

Methods and apparatus for transmitting data in a phase modulated signal derived from early and late timing signals

A single-ended receiver compares signal levels representing current symbols to levels representing immediately preceding symbols to resolve the symbols. The receiver applies offsets selected based on resolved prior symbols to interpret successive like-symbols.

Growing community of inventors

Carrboro, NC, United States of America

Michael D Bucher