US 11,979,129 B2 · Cascaded low-noise wideband active phase shifter

Abstract

Apparatus and associated methods relate to a low-noise wideband active phase shifter. The low-noise wideband active phase shifter includes first and second transconductance cells, a fixed LC series network and a tunable LC series network configured to form an all-pass lattice network. The first and second transconductance cells, each include a transistor, a feedback network, and a transistor biasing network. The transistor has an input terminal and an output terminal. The negative feedback network electrically couples the input and output terminals of the transistor. The biasing network provides input and output biasing of the transistor. The fixed LC series network connects between the first and the second transconductance cells. The tunable LC series network connects between the first and the second transconductance cells.

Claims14

Dependent claims

A low-noise wideband active phase shifter comprising:

first and second transconductance cells, each including:
a field-effect transistor FET having a source terminal, a gate terminal functioning as and input terminal, and a drain terminal functioning as an output terminal;
a feedback network that electrically couples the input and output terminals of the FET;
and
input and output biasing networks that provide input and output biasing of the FET, respectively;
a fixed LC series network connected between the output terminal of the FET of the first transconductance cell to the input terminal of the FET of the second transconductance cell;
and
a tunable capacitor network connected between the output terminal of the FET of the first transconductance cell and the source terminal of the FET of the second transconductance cell,
wherein the fixed LC series network and the tunable capacitor network form an all-pass lattice network with the first and second transconductance cells.

6 more elements

Dependencies are inferred from the claim text.

Cascaded low-noise wideband active phase shifter

Life of this patent

Cascaded low-noise wideband active phase shifter

Life of this patent

Abstract

Claims14