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US 7,999,629 B2Granted
IQ-modulation
AssigneeInfineon Technologies AG
InventorTimo Gossmann
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to I/Q modulation circuits, devices, and methods.
Claims28
An I/Q modulator device comprising:
- a first modulator component comprising at least one EXOR gate to combine an in-phase component of a local oscillator signal with a signal representing a sign of an in-phase component of a baseband signal to generate an output signal of the first modulator component;
- a second modulator component comprising at least one additional EXOR gate to combine a quadrature component of a local oscillator signal with a signal representing a sign of a quadrature component of a baseband signal to generate an output signal of the second modulator component;
- a third modulator component configured to combine the output signal of the first modulator component with a signal representing a magnitude of the in-phase component of the baseband signal to generate an output signal of the third modulator component;
- a fourth modulator component configured to combine the output signal of the second modulator component with a signal representing a magnitude of the quadrature component of the baseband signal to generate an output signal of the fourth modulator component;
- and
- a fifth modulator component configured to combine the output signals of the third and fourth modulator components to generate an output signal of the I/Q modulator.
3 more elements
A mixer in an I/Q modulator device for generating an in-phase component or quadrature component of an I/Q modulator signal, the mixer comprising:
- an input for receiving a signal representing the magnitude of an in-phase or quadrature component of a baseband signal;
- an input for receiving a differential signal representing a combination of an in-phase or quadrature component of a local oscillator signal and a signal representing the sign of the in-phase or quadrature component of the baseband signal;
- and
- an output for generating the in-phase or quadrature component of the modulator signal.
1 more element
A circuit to generate an in-phase or quadrature component of an I/Q modulator circuit output signal, the circuit comprising:
- a component to generate a non-differential signal representing a magnitude of a baseband signal;
- and
- a mixer configured to combine the non-differential signal output by the component with a differential signal representing a local oscillator signal combined with a signal representing a sign of the baseband signal, the mixer configured to generate the in-phase or quadrature component of the I/Q modulator circuit output signal.
A local oscillator signal processing device comprising:
- a first component to generate an in-phase component of a local oscillator signal;
- a second component coupled to the first component, the second component to synchronize signals output by the first component to a reference clock and generate clock-synchronized in-phase output signals;
- a third component to generate a quadrature component of the local oscillator signal, a subcomponent of the third component coupled to a subcomponent of the first component to form a master-slave latch flip-flop circuit;
- and
- a fourth component coupled to the third component, the fourth component to synchronize signals output by the third component to the reference clock to generate clock-synchronized quadrature output signals.
2 more elements
A method comprising:
- combining an in-phase component of a local oscillator signal with a sign component of an in-phase component of a baseband signal;
- combining a quadrature component of the local oscillator signal with a sign component of a quadrature component of the baseband signal;
- and
- synchronizing the combined in-phase component signal and the combined quadrature component signal to a reference clock to generate a clock-synchronized in-phase component of the local oscillator signal and a clock-synchronized quadrature component of the local oscillator signal.
1 more element
Dependencies are inferred from the claim text.