公开(公告)号：US20230046277A1

公开(公告)日：2023-02-16

申请号：US17403683

申请日：2021-08-16

Applicant: QUALCOMM Incorporated

Inventor： Aram AKHAVAN ,  Kentaro YAMAMOTO ,  Lei SUN ,  Ganesh KIRAN

IPC: H03M1/16 ,  H03F3/45 ,  H03M1/12

Abstract: Techniques and apparatus for output common-mode control of dynamic amplifiers, as well as analog-to-digital converters (ADCs) and other circuits implemented with such dynamic amplifiers. One example amplifier circuit includes a dynamic amplifier and a current source. The dynamic amplifier generally includes differential inputs, differential outputs, transconductance elements coupled to the differential inputs, a first set of capacitive elements coupled to the differential outputs, and a control input for controlling a time length of amplification for the dynamic amplifier. The current source is configured to generate an output current such that portions of the output current are selectively applied to the differential outputs of the dynamic amplifier during at least a portion of the time length of amplification.

公开(公告)号：US20200333819A1

公开(公告)日：2020-10-22

申请号：US16835494

申请日：2020-03-31

Applicant: QUALCOMM Incorporated

Inventor： Balasubramanian SIVAKUMAR ,  Dinesh Jagannath ALLADI ,  Kentaro YAMAMOTO ,  Sean BAKER ,  Liang ZHAO

IPC: G05F3/08

Abstract: An apparatus for generating a substantially constant DC reference voltage. The apparatus includes a reference voltage generator configured to generate a substantially constant direct current (DC) reference voltage based on a voltage on a data signal transmission line, wherein the voltage is based on a bandgap reference voltage. In one implementation, the data signal transmission line is a differential signal transmission line and the voltage is a common mode voltage. In another implementation, the data signal transmission line is an I-data signal transmission line and a Q-data signal transmission line, and the voltage is an average or weighted-average of the common mode voltages of the I- and Q-differential signals. In another implementation, the reference voltage is based on a single-ended (e.g., positive- and/or negative)-component or vice-versa of I- and Q-data signals, respectively.