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US 11,757,477 B2Granted
Device for generating radiofrequency signals in phase quadrature
AssigneeSTMicroelectronics (Alps) SAS
InventorsFrederic Rivoirard, Felix Gauthier
Life of this patent
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Abstract
An embodiment integrated electronic device comprises a mixer module including a voltage/current transconductor stage including first transistors and connected to a mixing stage including second transistors, wherein the mixing stage includes a resistive degeneration circuit connected to the sources of the second transistors and a calibration input connected to the gates of the second transistors and intended to receive an adjustable calibration voltage, and the sources of the first transistors are directly connected to a cold power supply point.
Claims19
An electronic device comprising:
- a first mixer module comprising:
- a voltage/current transconductor stage comprising:
- first transistors;
- a polarization circuit including two first resistors respectively connected between gates of the first transistors and a polarization input configured to receive an adjustable polarization bias voltage for setting of a current circulating in the first transistors;
- a first current amplifier block having a first capacitor connected between a gate of a first one of the first transistors and a gate of a third transistor, and a second resistor coupled between the gate of the third transistor and a drain of the third transistor;
- and
- a second current amplifier block having a second capacitor connected between a gate of a second one of the first transistors and a gate of a fourth transistor, and a third resistor coupled between the gate of the fourth transistor and a drain of the fourth transistor;
- and
- a mixing stage connected to the voltage/current transconductor stage, the mixing stage comprising:
- second transistors;
- a resistive degeneration circuit connected to sources of the second transistors;
- and
- a calibration input connected to gates of the second transistors and configured to receive an adjustable calibration voltage, wherein sources of the first transistors are directly connected to a cold power supply point;
- and
- a calibration circuit configured to adjust the adjustable calibration voltage in accordance with at least a phase of outputs of the second transistors.
12 more elements
A communication apparatus comprising:
- a signal generator having two first generation terminals configured to generate two first sinusoidal signals offset by 180° and two second generation terminals configured to generate two first cosinusoidal signals offset by 180°, the first sinusoidal and first cosinusoidal signals having a same initial frequency;
- a first mixer module, including two first input terminals and two second input terminals respectively connected to the two first generation terminals;
- a second mixer module, including two third input terminals and two fourth input terminals respectively connected to the two second generation terminals;
- wherein two output terminals of the first mixer module are respectively connected to two opposite output terminals of the second mixer module, thereby forming two first output nodes configured to generate two second cosinusoidal signals offset by 180° having a frequency double the initial frequency;
- a third mixer module, including two fifth input terminals respectively connected to the two first generation terminals, and two sixth input terminals respectively connected to the two second generation terminals;
- a fourth mixer module, including two seventh input terminals respectively connected to the two second generation terminals, and two eighth input terminals respectively connected to the two first generation terminals;
- wherein two output terminals of the third mixer module are respectively connected to two homologous output terminals of the fourth mixer module, thereby forming two second output nodes configured to generate two second sinusoidal signals offset by 180° having a frequency double the initial frequency;
- wherein each mixer module comprises:
- a mixing stage comprising:
- second transistors;
- a resistive degeneration circuit connected to sources of the second transistors;
- and
- a calibration input connected to gates of the second transistors and configured to receive an adjustable calibration voltage;
- and
- a voltage/current transconductor stage connected to the mixing stage, the voltage/current transconductor stage comprising:
- a polarization circuit including two first resistors respectively connected between gates of first transistors and a polarization input configured to receive an adjustable polarization bias voltage for setting of a current circulating in the first transistors;
- a first current amplifier block having a first capacitor connected between a gate of a first one of the first transistors and a gate of a third transistor, and a second resistor coupled between the gate of the third transistor and a drain of the third transistor;
- and
- a second current amplifier block having a second capacitor connected between a gate of a second one of the first transistors and a gate of a fourth transistor, and a third resistor coupled between the gate of the fourth transistor and a drain of the fourth transistor;
- a reception chain;
- an emission chain;
- wherein the reception chain and the emission chain are configured to receive, from the first and second output nodes, the second sinusoidal and second cosinusoidal signals forming two components offset by 90° of a frequency transposition signal;
- and
- a calibration circuit configured to adjust the adjustable calibration voltage for the mixer modules according to a phase shift between the second sinusoidal and second cosinusoidal signals generated at the first and second output nodes.
21 more elements
Dependencies are inferred from the claim text.