Patent ID: 11894968
Assignee: SWIFTLINK TECHNOLOGIES INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A receive in-phase quadrature (IQ) amplifier, comprising:
an in-phase (I) phase switching gain stage to receive a balanced input signal and to generate an amplified phase switching I signal at ports (VI+, VI−);
a quadrature (Q) phase switching gain stage to receive the balanced input signal and to generate an amplified phase switching Q signal at ports (VQ+, VQ−); and
an in-phase quadrature (IQ) poly-phase filter coupled to the I and Q phase switching gain stages to receive the phase switching I and Q signals and to output a balanced signal (VO+, VO−),
wherein the I phase switching gain stage comprises:
a first trans-conductance stage, comprising a first and a second transistors, each having source terminals coupled to a first common node, gate terminals to receive a corresponding component of the balanced input signal (Vi+, Vi−), and
a first active switching circuit coupled to the first trans-conductance stage.