Inphase quadrature current selector amplifiers for wireless communication
AssigneeSwiftlink Technologies Inc.
InventorsAyman Eltaliawy, Min-Yu Huang
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Abstract
A transmit in-phase quadrature (IQ) amplifier includes a common gain stage to receive an input signal and to generate an amplified signal. The amplifier includes an IQ poly-phase filter coupled to the common gain stage to receive the amplified signal from the common gain stage and outputs a four-phase signal. The amplifier includes an in-phase (I) phase switching gain stage coupled to the IQ poly-phase filter to receive I components of the four-phase signal and outputs an amplified phase switching I signal. The amplifier includes a quadrature (Q) phase switching gain stage coupled to the IQ poly-phase filter to receive Q components of the four-phase signal and outputs an amplified phase switching Q signal.
Claims20
A transmit in-phase quadrature (IQ) amplifier, comprising:
- a common gain stage to receive an input signal and to generate an amplified signal;
- an in-phase quadrature (IQ) poly-phase filter coupled to the common gain stage to receive the amplified signal from the common gain stage and outputs a four-phase signal;
- an in-phase (I) phase switching gain stage coupled to the IQ poly-phase filter to receive I components of the four-phase signal and outputs an amplified phase switching I signal;
- and
- a quadrature (Q) phase switching gain stage coupled to the IQ poly-phase filter to receive Q components of the four-phase signal and outputs an amplified phase switching Q signal,
- wherein the I or Q phase switching gain stage comprises a passive phase switching component or an active phase switching component.
A receive in-phase quadrature (IQ) amplifier, comprising:
- an in-phase (I) phase switching gain stage to receive an I component of an input signal and to generate an amplified phase switching I signal;
- a quadrature (Q) phase switching gain stage to receive a Q component of the input signal and to generate an amplified phase switching Q signal;
- an in-phase quadrature (IQ) poly-phase filter coupled to the I and Q phase switching gain stages to receive the amplified phase switching I and Q signals and outputs a balanced signal;
- and
- a common gain stage coupled to the IQ poly-phase filter to receive the balanced signal from the IQ poly-phase filter and outputs an amplified balanced signal,
- wherein the I or Q phase switching gain stage comprises a passive phase switching component or an active phase switching component.
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.
Dependencies are inferred from the claim text.