A transmitter circuit is disclosed. The transmitter circuit includes a frequency circuit configured to generate a frequency signal, a power amplifier configured to drive an antenna with a drive signal according to the frequency signal, and a programmable delay circuit configured to controllably extend a propagation delay between the frequency signal generated by the frequency circuit and the drive signal of the power amplifier. The programmable delay circuit is programmed with a programming value which causes the transmitter circuit to pass a calibration test.

A circuit includes a polar transmitter to generate a radio frequency output from amplitude and phase signal components. The polar transmitter includes an amplifier to combine amplitude and phase signal components. A processor is coupled to the polar transmitter to provide the amplitude and phase signal components. The processor includes: a digital modulation circuit to generate a modulated digital signal including in-phase and quadrature signal components and a correction circuit to calculate and apply a complex digital offset for local oscillator feedthrough of the amplifier. The complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.

The present disclosure is directed a wideband multiphase transmitter with two-point modulation. A transmitter includes a control circuit configured to receive a source signal having amplitude and phase components. Using the phase component, the control circuit generates a frequency control signal and a phase jump signal. The transmitter further includes a phase conversion circuit configured to generate a first phase-modulated signal using the phase component and the frequency control signal. The phase conversion circuit is also configured to adjust the phase of the first phase-modulated signal using the phase jump signal. The first phase-modulate signal and the amplitude component are provided to an amplifier, which generates a transmit signal based thereon.

A method for determining a signal propagation time mismatch in a modulator comprises generating a predetermined signal shape of a amplitude component of a radio frequency signal generating one or more predetermined conditions in a frequency component of the radio frequency signal at a first time interval relative to the predetermined signal shape and detecting the one or more predetermined conditions in the frequency component at a second time interval. The method further includes determining the amplitude component at the second time interval and calculating a signal propagation time mismatch value based on the signal shape of the amplitude component, on the first time interval and the second time interval.

A method for transmission of signal is provided, the method comprising the steps of receiving one or more modulating signals, generating one or more modulated sinusoidal carrier waves with zero side bands, including one or more sine wave cycles at carrier frequency that have a predetermined one or more properties, defined for complete cycle at the beginning of each sine cycle at one or more zero voltage crossing points in accordance with the one or more values of the one or more modulating signals. The one or more predetermined properties to change, is selected from group of amplitude, frequency, phase, time period and combinations thereof.

A method for transmission of signal is provided, the method comprising the steps of receiving one or more modulating signals, generating one or more modulated sinusoidal carrier waves with zero side bands, including one or more sine wave cycles at carrier frequency that have a predetermined one or more properties, defined for complete cycle at the beginning of each sine cycle at one or more zero voltage crossing points in accordance with the one or more values of the one or more modulating signals. The one or more predetermined properties to change, is selected from group of amplitude, frequency, phase, time period and combinations thereof.

There is provided a high-speed tele-communication method and a high-speed tele-communication system which can be easily realized with a simple configuration, with good operability, at low cost, and in a short term without considerably improving or substituting existing communication-related equipment by improving the foregoing problems of technologies in the related art.

A high-speed tele-communication method high-speed tele-communication system 100 causes a waveform within a unit period time in an analog waveform signal of a carrier wave or basic frequency wave 400 to respond to a digital signal 300 of information BD to be transmitted and deform the waveform.

A phase and amplitude controlled oscillation device is configured in such a manner that a first controller and a second controller control a phase of a combined output wave obtained by a combiner by performing control to shift phases of respective oscillation frequencies of a first oscillator and a second oscillator in the same direction, and control an amplitude of the combined output wave obtained by the combiner by performing control to shift the phases of the respective oscillation frequencies of the first oscillator and the second oscillator in opposite directions.

Phase and/or amplitude modulation device, comprising a TORP signal generator, and further including, during a phase modulation or a phase and amplitude modulation, a generator of a phase-modulated periodic signal of frequency F.sub.PRP applied to a control input of the power supply circuit of the TORP generator, and/or including, during an amplitude modulation or a phase and amplitude modulation: 2.sup.P TORP generators, a thermometric code generator on 2.sup.P bits coding an amplitude modulation, a TORP generator control circuit, applying or not, to the control input of the TORP generator power supply, the periodic signal of frequency F.sub.PRP depending on the bits of the thermometric code signal, and a processing circuit coupled to the outputs of the TORP generators, and configured to produce a linear combination of signals outputted by the TORP generators.

The present disclosure relates to a polar phase or frequency modulator comprising: a normalized delay circuit (602) configured to delay edges of an input carrier signal (CLK_IN) based on normalized delay control values (i) to generate a modulated output signal (RF_OUT); and a normalized delay calculator (604) configured to receive the modulated output signal (RF_OUT) and to generate the normalized delay control values (i).