Columbia University

International Business Machines Corporation

Anandaroop Chakrabarti

Harish Krishnaswamy

Bodhisatwa Sadhu

Mark Ferriss

Circuits comprising: digital-to-amplitude converter (DAC), comprising: binary weighted switching transistors (BWSTs), each having gate coupled to amplitude control bit ACB, and wherein the drain of each of the BWSTs are connected together and wherein the source of each of the BWSTs are connected together; transistor Mhaving gate coupled to input signal and first bias voltage BVand source coupled to the drains of the BWSTs; transistor Mhaving gate coupled to BVand source coupled to the drain of M; transistor Mhaving gate coupled to BVand source coupled to the drain of M; transistor having gate coupled to BV, source coupled to the drain of M; and inverter having input coupled to another ACB and having output coupled to the output of the DAC and the drain of M

Wireless-transmitter circuits including power digital-to-amplitude converters

In some embodiments, circuits for providing Class-E power amplifiers are provided, the circuits comprising: a first switch having a first side and a second side; a first Class-E load network coupled to the first side of the first switch; a second Class-E load network; and a second switch having a first side and a second side, the first side of the second switch being coupled the second side of the first switch and the second Class-E load network. In some embodiments, the circuits further comprise: a third switch having a first side and a second side; a third Class-E load network coupled to the first side of the third switch; a fourth Class-E load network; and a fourth switch having a first side and a second side, the first side of the fourth switch being coupled the second side of the third switch and the fourth Class-E load network.

Circuits for providing Class-E power amplifiers

An integrated electronic circuit is provided. The integrated electronic circuit includes a transconductance cell formed from transconductance cell devices. The integrated electronic circuit further includes active and passive decoupling circuits. The integrated electronic circuit also includes an oscillator having a tank that is direct current decoupled from the transconductance cell devices using the active and passive decoupling circuits to increase voltage swing and decrease phase noise of the oscillator.

Oscillator phase noise using active device stacking

Improving oscillator phase noise using active device stacking

In some embodiments, circuits for providing Class-E power amplifiers are provided, the circuits comprising: a first switch having a first side and a second side; a first Class-E load network coupled to the first side of the first switch; a second Class-E load network: and a second switch having a first side and a second side, the first side of the second switch being coupled the second side of the first switch and the second Class-E load network. In some embodiments, the circuits further comprise: a third switch having a first side and a second side; a third Class-E load network coupled to the first side of the third switch; a fourth Class-E load network; and a fourth switch having a first side and a second side, the first side of the fourth switch being coupled the second side of the third switch and the fourth Class-E load network.

Growing community of inventors

New York, NY, United States of America

Anandaroop Chakrabarti