An electronic circuit including: a differential multiplier circuit with a first differential input and a second differential input and a differential output; and a phase locked loop (PLL) circuit including: (1) a balanced differential mixer circuit with a first differential input electrically connected to the differential output of the differential multiplier circuit, a second differential input, and an output; (2) a loop filter having an output and an input electrically connected to the output of the balanced differential mixer circuit; and (3) a voltage controlled oscillator (VCO) circuit having an input electrically connected to the output of the loop filter and with an output electrically feeding back to the second differential input of the balanced differential mixer circuit.

A down-conversion mixer includes a trans conductance circuit and a mixing circuit. The transconductance circuit includes: first and second transconductance units cooperatively converting a differential input voltage signal pair into a differential input current signal pair; and an inductor coupled between the first and second transconductance units. The mixing circuit is coupled to a common node of the first trans conductance unit and the inductor and to a common node of the second transconductance unit and the inductor for receiving the differential input current signal pair therefrom, and mixes the differential input current signal pair with a differential oscillatory voltage signal pair to generate a differential mixed voltage signal pair.

A down-conversion mixer includes a trans conductance circuit and a mixing circuit. The transconductance circuit includes: first and second transconductance units cooperatively converting a differential input voltage signal pair into a differential input current signal pair; and an inductor coupled between the first and second transconductance units. The mixing circuit is coupled to a common node of the first trans conductance unit and the inductor and to a common node of the second transconductance unit and the inductor for receiving the differential input current signal pair therefrom, and mixes the differential input current signal pair with a differential oscillatory voltage signal pair to generate a differential mixed voltage signal pair.

Octagonal phase rotator includes an I-mixer having an I-DAC for steering current between positive and negative phases of an in-phase signal depending on k I-DAC control bits of a control code, a Q-mixer having a Q-DAC for steering current between the positive/negative phases of a quadrature signal depending on k Q-DAC control bits of the code, and an IQ-mixer having n IQ-mixer units each comprising an IQ-DAC for switching a second current unit between the in-phase and quadrature signals, in dependence on a respective bit of n IQ-DAC control bits, and between the positive/negative phases of the in-phase and quadrature signals via I and Q polarity switches respectively of that component. I and Q polarity switches of some different IQ-DAC components switch depending on different I-DAC control bits and Q-DAC control bits respectively. A summation circuit sums weighted output signals from the mixers to produce an output signal of phase.

A mixer includes a transconductance circuit and a mixing circuit. The transconductance circuit includes a capacitor and first and second transconductance modules. The first transconductance module converts a single-ended to-be-shifted voltage signal at a first terminal of the capacitor into a first input current signal. The second transconductance module converts a voltage signal at a second terminal of the capacitor into a second input current signal that cooperates with the first input current signal to constitute a differential input current signal pair. The mixing circuit mixes the differential input current signal pair with a differential oscillatory voltage signal pair to generate a differential mixed voltage signal pair.

An electronic circuit including: a differential multiplier circuit with a first differential input and a second differential input and a differential output; and a phase locked loop (PLL) circuit including: (1) a balanced differential mixer circuit with a first differential input electrically connected to the differential output of the differential multiplier circuit, a second differential input, and an output; (2) a loop filter having an output and an input electrically connected to the output of the balanced differential mixer circuit; and (3) a voltage controlled oscillator (VCO) circuit having an input electrically connected to the output of the loop filter and with an output electrically feeding back to the second differential input of the balanced differential mixer circuit.

Octagonal phase rotator includes an I-mixer having an I-DAC for steering current between positive and negative phases of an in-phase signal depending on k I-DAC control bits of a control code, a Q-mixer having a Q-DAC for steering current between the positive/negative phases of a quadrature signal depending on k Q-DAC control bits of the code, and an IQ-mixer having n IQ-mixer units each comprising an IQ-DAC for switching a second current unit between the in-phase and quadrature signals, in dependence on a respective bit of n IQ-DAC control bits, and between the positive/negative phases of the in-phase and quadrature signals via I and Q polarity switches respectively of that component. I and Q polarity switches of some different IQ-DAC components switch depending on different I-DAC control bits and Q-DAC control bits respectively. A summation circuit sums weighted output signals from the mixers to produce an output signal of phase.

Octagonal phase rotator includes an I-mixer having an I-DAC for steering current between positive and negative phases of an in-phase signal depending on k I-DAC control bits of a control code, a Q-mixer having a Q-DAC for steering current between the positive/negative phases of a quadrature signal depending on k Q-DAC control bits of the code, and an IQ-mixer having n IQ-mixer units each comprising an IQ-DAC for switching a second current unit between the in-phase and quadrature signals, in dependence on a respective bit of n IQ-DAC control bits, and between the positive/negative phases of the in-phase and quadrature signals via I and Q polarity switches respectively of that component. I and Q polarity switches of some different IQ-DAC components switch depending on different I-DAC control bits and Q-DAC control bits respectively. A summation circuit sums weighted output signals from the mixers to produce an output signal of phase.

A mixer includes a transconductance circuit and a mixing circuit. The transconductance circuit includes a capacitor and first and second transconductance modules. The first transconductance module converts a single-ended to-be-shifted voltage signal at a first terminal of the capacitor into a first input current signal. The second transconductance module converts a voltage signal at a second terminal of the capacitor into a second input current signal that cooperates with the first input current signal to constitute a differential input current signal pair. The mixing circuit mixes the differential input current signal pair with a differential oscillatory voltage signal pair to generate a differential mixed voltage signal pair.

A mixer includes a trans conductance unit, a gain boost unit, a mixing module and a buffer. The trans conductance unit, the gain boost unit and the mixing module cooperatively mix a differential input voltage signal pair with a differential oscillatory voltage signal pair to generate a differential mixed voltage signal pair. The buffer performs buffering on the differential mixed voltage signal pair, and has inductance that cooperates with parasitic capacitance at output terminals thereof to form an LC tank circuit that reaches resonance at a frequency of the differential mixed voltage signal pair to behave as an open circuit.