Suresh Natarajan Rajan, 624239 Santa Monica Ter, Fremont, CA 94539

6781405, Aug 24, 2004

Apr 29, 2002

10/135222

Suresh Rajan - San Jose CA
Scott Best - Palo Alto CA

Rambus Inc. - Los Altos CA

H03K 1716

326 30, 326 32, 326 33

A system and method of terminating signals are described. In one embodiment, the termination system of the present invention comprises a receiver for receiving a signal from a transmission line, a termination node, a resistive element disposed between the receiver and the termination node, and a termination voltage controller for changing the voltage level of the termination node, in response to the detected signal voltage level. In another embodiment, the present invention includes a method of adaptively terminating a signal. The method of this embodiment comprises detecting the voltage level of a signal, selecting the termination voltage level of a termination node in response to the detected signal voltage level, and terminating the signal, through a resistive element, at the selected termination voltage level.

6998892, Feb 14, 2006

Feb 13, 2002

10/075531

David Nguyen - San Jose CA, US
Suresh Rajan - San Jose CA, US

Rambus Inc. - Los Altos CA

H03L 7/00

327161, 713401

A method and apparatus for accommodating delay variations among multiple signals are provided. According to one embodiment of the invention, transitions of one or more of a plurality of lines between different levels are detected. The timing of a signal affecting recovery of information from the plurality of lines is adjusted according to the transitions detected. Examples of such a signal include one or more signals carried on one or more of the plurality of lines and a timing signal carried on a line separate from the plurality of lines.

6999516, Feb 14, 2006

Oct 24, 2001

09/983412

Suresh Rajan - San Jose CA, US

Rambus Inc. - Los Altos CA

H03B 14/06
H03M 5/00

375244, 341 55

A technique for emulating differential signaling is disclosed. In one exemplary embodiment, the technique is realized by encoding a plurality of input signals so as to generate a plurality of encoded signals having a spatial run length of N, wherein N is an integer having a value of at least two. Each of the plurality of encoded signals is then transmitted over a transmission medium so as to provide a respective plurality of transmitted encoded signals. Each of the plurality of transmitted encoded signals is then compared with at least N neighboring others of the plurality of transmitted encoded signals so as to recover a representation of each of the plurality of encoded signals. Each of the plurality of recovered encoded signals is then decoded so as to generate a plurality of decoded signals representing the plurality of input signals.

7127003, Oct 24, 2006

Sep 23, 2002

10/253312

Suresh Rajan - San Jose CA, US
Scott C. Best - Palo Alto CA, US

Rambus Inc. - Los Altos CA

H04L 25/34
H03B 1/00

375286, 341143

Systems, methods, apparatuses, and arrangements enable information to be communicated across a link using different types of signaling. For example, a first type of information is communicated across a bus using a first type of signaling while a second type of information is communicated across the bus using a second type of signaling. By way of example but not limitation, in certain implementation(s) a system including a transmitting unit and a receiving unit are connected by a multi-line bus. The transmitting unit transmits data signals over the multi-line bus using differential signaling and transmits control signals over the multi-line bus using single-ended signaling. The receiving unit interprets signals received in a differential signaling format via the multi-line bus as data signals and interprets signals received in a single-ended signaling format via the multi-line bus as control signals.

7184483, Feb 27, 2007

Jan 6, 2006

11/326343

Suresh Rajan - San Jose CA, US

Rambus Inc. - Los Altos CA

H04B 14/06

375244

A technique for emulating differential signaling is disclosed. In one exemplary embodiment, the technique is realized by encoding a plurality of input signals so as to generate a plurality of encoded signals having a spatial run length of N, wherein N is an integer having a value of at least two. Each of the plurality of encoded signals is then transmitted over a transmission medium so as to provide a respective plurality of transmitted encoded signals. Each of the plurality of transmitted encoded signals is then compared with at least N neighboring others of the plurality of transmitted encoded signals so as to recover a representation of each of the plurality of encoded signals. Each of the plurality of recovered encoded signals is then decoded so as to generate a plurality of decoded signals representing the plurality of input signals.

7196539, Mar 27, 2007

Mar 12, 2004

10/800192

Suresh Rajan - San Jose CA, US
Scott Best - Los Altos CA, US

Rambus Inc. - Los Altos CA

H03K 19/003

326 30, 326 32, 326 33

An input signal is transmitted from a first device to a second device. At the second device the input signal method is received, and an output signal is generated in response to the input signal. The output signal is sensed, and the input signal is dynamically terminated in response to sensing the output data. In some embodiments, the receiving, generating and dynamically terminating occur within a single integrated circuit. In some embodiments, the method includes detecting a signal voltage level of the input signal and causing a termination voltage level to change from a first voltage level to a second voltage level in response to the signal voltage level.

7231306, Jun 12, 2007

Apr 30, 2002

10/135871

Suresh Rajan - San Jose CA, US
Scott Best - Palo Alto CA, US

Rambus Inc. - Los Altos CA

G01D 18/00

702 89

Methods and apparatuses for calibrating out static timing offsets across multiple outputs of a transmitting device are provided. In accordance with at least one embodiment, a signal is selected as the master reference signal, and a closed-loop feedback system is provided to align one or more outputs of the transmitting device to a master reference signal. The master reference signal can be one of the signals being output by the transmitting device, an internal signal that is representative of the desired placement of the edges, or an external signal received by the transmitting device. The signal from the transmitting device is received by a receiver, and a calibration control block is used to generate a control signal to adjust the operation of the transmitting device.

7379316, May 27, 2008

Sep 1, 2006

11/515406

Suresh N. Rajan - San Jose CA, US

MetaRAM, Inc. - San Jose CA

G11C 5/06

365 63, 365 52, 365233

Large capacity memory systems are constructed using stacked memory integrated circuits or chips. The stacked memory chips are constructed in such a way that eliminates problems such as signal integrity while still meeting current and future memory standards.