Somnath Kundu

US Patent:

20210305939, Sep 30, 2021

Filed:

Mar 27, 2020

Appl. No.:

16/833298

Inventors:

- Santa Clara CA, US
Hao Luo - Milpitas CA, US
Somnath Kundu - Hillsboro OR, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H03B 5/06
H03B 5/36
H03B 5/12

Abstract:

An apparatus injects a start clock to a crystal at the beginning to increase an overall start up speed of the crystal. The apparatus relies on an impedance change inside the crystal itself instead of searching for a synchronization on the yet small crystal oscillation. The apparatus includes an oscillator (separate from the crystal) to search for the crystal's resonance frequency by detecting the crystal's impedance change. Once the frequency of the oscillator matches the crystal's resonance, there is significant change in the crystal's impedance. Using that information, the apparatus can lock the oscillator frequency at the crystal resonance frequency and inject the clock with high efficiency.

US Patent:

20200295765, Sep 17, 2020

Filed:

Mar 13, 2019

Appl. No.:

16/352043

Inventors:

- Santa Clara CA, US
Alon Cohen - Petach Tikva, IL
Gil Horovitz - Emek-Hefer, IL
Somnath Kundu - Hillsboro OR, US
Run Levinger - Tel Aviv, IL
Stefano Pellerano - Beaverton OR, US
Jahnavi Sharma - Hillsboro OR, US
Evgeny Shumaker - Nesher, IL
Izhak Hod - Haifa, IL

International Classification:

H03L 7/081
H03L 7/083

Abstract:

A quadrature based voltage controlled oscillator (VCO) local oscillator (LO) system is disclosed. The system includes a phase detector, a quadrature phase VCO, a quadrature control path, an in-phase control path, and an in-phase VCO. The phase detector is configured to compare and generate phase error between a reference clock and an in-phase VCO output. The quadrature control path configured to generate a quadrature control voltage based on a quadrature VCO output and the in-phase VCO output. The quadrature phase VCO configured to generate the quadrature VCO output based on the quadrature control voltage and the generated phase error. The in-phase control path configured to generate an in-phase control voltage based on the quadrature VCO output and the in-phase VCO output. The in-phase VCO is configured to generate the in-phase VCO output based on the in-phase control voltage and the generated phase error. An all digital dual mode phase locked/phase tracking loop LO generate system is also disclosed.

US Patent:

20180351770, Dec 6, 2018

Filed:

Nov 8, 2017

Appl. No.:

15/806901

Inventors:

- Minneapolis MN, US
Somnath Kundu - Hillsboro OR, US
Hyung-il Kim - Woodbury MN, US

International Classification:

H04L 25/03
H04L 7/00

Abstract:

A time-based decision feedback equalizer (TB-DFE) circuit may include a voltage-to-time converter configured to convert a communication signal into a time-based signal. A timing of when an edge of the time-based signal occurs is indicative of a voltage level of the communication signal. The circuit may include a plurality of delay circuits arranged to process the time-based signal in series to generate a delay data signal. The delay circuits may adjust the timing of when the edge of the time-based signal occurs, and a corresponding time delay introduced by each of the delay circuits may be based on a respective weighting factor applied to one or more samples of an output digital signal previously generated by the TB-DFE circuit. A phase detector may compare a timing of an edge of the delay data signal with a reference clock signal and generate the output digital signal based on the comparison.