Maxim Integrated Products, Inc.

Yang Qian

Geir Ostrem

John Frank Scampini

Yi Zhang

Ed Liu

Jean-Marc Roger Mourant

Phillip Elliott

Philip Elliott

A continuous time delta sigma modulator includes a quantizer, a buffer module, and a reference module. The quantizer includes a comparator that updates a digital output each cycle of a clock signal based on a comparison of a reference potential with an input generated based on a sample of an analog signal. The buffer module receives the digital output, stores the digital output for a predetermined delay period, and outputs the digital output after the predetermined delay period as a delayed digital output. The predetermined delay period is less than one cycle of the clock signal. The reference module selectively varies the reference potential based on the delayed digital output.

Digital technique for excess loop delay compensation in a continuous-time delta sigma modulator

A continuous time delta sigma modulator includes a quantizer and a reference module. The quantizer includes: a first comparator that generates a first digital output based on a comparison of a first reference potential with an input generated based on a sample of an analog signal; and a second comparator that generates a second digital output based on a comparison of a second reference potential with the input generated based on the sample of the analog signal. The reference module varies the first and second reference potentials based on the first and second digital outputs.

A variable gain amplifier may include a gain block, a voltage control block, and a unity gain buffer block. The gain block may include a plurality of amplifiers having a fixed gain. The voltage control block is coupled to the output of the gain block. Moreover, the voltage control block controls, based on control voltages applied to the plurality of amplifiers having fixed gain, current output by the plurality of amplifiers. The unity gain buffer amplifier is coupled to receive the current output by the plurality of amplifiers of the voltage control block. The unity gain buffer amplifier provides an output signal of the variable gain amplifier. Related systems, methods, and articles are also described.

Growing community of inventors

Fremont, CA, United States of America

Yang Qian