Psemi Corporation

Qualcomm Incorporated

Ping Wing Lai

Khushali Shah

Yucheng Tong

Bhushan Shanti Asuri

Dongwon Seo

Vinod Panikkath

Shahin Mehdizad Taleie

Krishnaswamy Thiagarajan

Behnam Sedighi

Ashok Swaminathan

Nitz Saputra

Ibrahim Ramez Chamas

Ayush Mittal

Sameer Vasantlal Vora

Zhilong Tang

Tonmoy Biswas

Yen-Wei Chang

Sy-Chyuan Hwu

Circuits and methods for generating a bypass pulse to an RF circuit that increases the response time of the circuit to mode changes. Embodiments include a pulse generation circuit that it is self-initiated and self-terminated, generating a bypass pulse as a function of voltages Vand Valong a signal path. Voltage V, a scaled version of V, is compared to a voltage Vderived from Vand a pulse is output while V>V. The pulse temporarily lowers the signal path impedance, reducing the RC time constant of the signal path and allowing fast charging of components coupled to the signal path. The pulse may be used with any other circuit that needs a faster settling time after a mode change but is slowed down by an RC time constant. Usage also extends to providing for rapid discharge of the signal path by adding additional logic components.

Dynamic fast charge pulse generator for an RF circuit

Circuits and methods for generating a bypass pulse to an RF circuit that increases the response time of the circuit to mode changes. Embodiments include a pulse generation circuit that it is self-initiated and self-terminated, generating a bypass pulse as a function of voltages Vand Valong a signal path. Voltage V, a scaled version of V, is compared to a voltage Vderived from Vand a pulse is output while V&#x3e;V. The pulse temporarily lowers the signal path impedance, reducing the RC time constant of the signal path and allowing fast charging of components coupled to the signal path. The pulse may be used with any other circuit that needs a faster settling time after a mode change but is slowed down by an RC time constant. Usage also extends to providing for rapid discharge of the signal path by adding additional logic components.

A communication circuit may include a first pair of digital-to-analog converters (DACs) coupled to an input of a first mixer and configured to generate first baseband signals. The communication circuit may further include a second pair of DACs coupled to an input of a second mixer and configured to generate second baseband signals. The second baseband signals may be shifted in phase relative to the first baseband signals.

Communication circuit including a transmitter

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San Diego, CA, United States of America

Ping Wing Lai