US 12,706,623 B2 · Wireless transmitter with bias control

Abstract

Certain aspects of the present disclosure generally relate to electronic circuits, and more particularly, to wireless transmitters. One example apparatus generally includes: an in-phase direct-current (DC) level shifter; a quadrature DC level shifter; an in-phase voltage-to-current (V2I) converter having an input coupled to an output of the in-phase DC level shifter; a quadrature V2I converter having an input coupled to an output of the quadrature V2I converter; a bias control circuit having inputs coupled to the in-phase V2I converter and the quadrature V2I converter, an output of the bias control circuit being coupled to at least one of the in-phase DC level shifter or the quadrature DC level shifter; an in-phase mixer having an input coupled to an output of the in-phase V2I converter; and a quadrature mixer having an input coupled to an output of the quadrature V2I converter.

Claims30

Dependent claims

An apparatus for wireless communication, comprising:

an in-phase direct-current (DC) level shifter;
a quadrature DC level shifter;
an in-phase voltage-to-current (V2I) converter having an input coupled to an output of the in-phase DC level shifter;
a quadrature V2I converter having an input coupled to an output of the quadrature V2I converter;
a bias control circuit having inputs coupled to the in-phase V2I converter and the quadrature V2I converter, an output of the bias control circuit being coupled to at least one of the in-phase DC level shifter or the quadrature DC level shifter;
an in-phase mixer having an input coupled to an output of the in-phase V2I converter;
and
a quadrature mixer having an input coupled to an output of the quadrature V2I converter.

5 more elements

A method for wireless communication, comprising:

generating, via an in-phase direct-current (DC) level shifter, an in-phase level-shifted signal;
generating, via a quadrature DC level shifter, a quadrature level-shifted signal;
converting, via an in-phase voltage-to-current (V2I) converter, the in-phase level-shifted signal to an in-phase current;
converting, via a quadrature V2I converter, the quadrature level-shifted signal to a quadrature current;
sensing, via a bias control circuit, signals at nodes of the in-phase V2I converter and the quadrature V2I converter;
providing a bias signal to at least one of the in-phase DC level shifter or the quadrature DC level shifter based on the sensing;
generating, via an in-phase mixer, an upconverted in-phase signal based on the in-phase current;
and
generating, via a quadrature mixer, an upconverted quadrature signal based on the quadrature current.

6 more elements

An apparatus for wireless communication, comprising:

an in-phase direct-current (DC) level shifter;
a quadrature DC level shifter;
an in-phase voltage-to-current (V2I) converter having an input coupled to an output of the in-phase DC level shifter;
a quadrature V2I converter having an input coupled to an output of the quadrature V2I converter;
an in-phase mixer having an input coupled to an output of the in-phase V2I converter;
a quadrature mixer having an input coupled to an output of the quadrature V2I converter;
a current-sensing circuit having inputs coupled to a positive differential output and a negative differential output of at least one of the in-phase mixer or the quadrature mixer;
and
a digital-to-analog converter (DAC) having an input coupled to the current-sensing circuit and an output coupled to the at least one of the in-phase V2I converter or the quadrature V2I converter.

6 more elements

Dependencies are inferred from the claim text.

Wireless transmitter with bias control

Life of this patent

Wireless transmitter with bias control

Life of this patent

Abstract

Claims30