30 results about "Phase oscillator" patented technology

A transmitter and a signal amplifier are provided. The signal amplifier includes a digital-to-analog converter converting an input digital signal into an analog signal, a local oscillator signal generator outputting in-phase and quadrature-phase oscillator signals, a first mixer mixing the analog signal with the in-phase local oscillator signal to output an in-phase high frequency signal, a second mixer mixing the analog signal with the quadrature-phase local oscillator signal to output a quadrature-phase high frequency signal, a main amplifier amplifying the in-phase high frequency signal output from the first mixer, and an auxiliary amplifier amplifying the quadrature-phase high frequency signal output from the second mixer.

A transmitter includes a first amplifier to amplify an in-phase oscillator signal to produce an in-phase mixing signal and a second amplifier to amplify a quadrature-phase oscillator signal to produce a quadrature-phase mixing signal. A first mixer mixes the in-phase mixing signal with a first information signal to produce a first output signal. A second mixer mixes the quadrature-phase mixing signal with a second information signal to produce a second output signal. The first output signal and an inverted second output signal are summed to produce a transmitter output signal that includes an image signal caused by a phase imbalance between the in-phase and quadrature-phase mixing signals. An image monitor monitors the image signal and reduces or eliminates the phase imbalance by independently adjusting a phase of the in-phase mixing signal and / or a phase of the quadrature-phase mixing signal. Consequently, a power of the image signal is reduced or eliminated.

The disclosure provides an effective means for fine-resolution determination of the frequency content of an RF signal using low speed digital circuits. The disclosure relates to a method and apparatus for decomposing a high frequency RF signal into several low frequency signals or data streams without loss of any information and without the use of extraneous circuit components such as local oscillators, mixers or offset phase-locked loops. Single or multiple phase oscillator outputs are fed directly to a single or multiple direct RF frequency-to-digital (DrfDC) circuits. The front end of the DrfDC circuit decomposes a high frequency signal into several low frequency signals without loss of any information. The low frequency signals are processed by the back-end of the DrfDC and converted into digital data streams. The digital data streams are then combined and averaged to represent the frequency of the input RF signal.

A quadrature phase oscillator in a Radio Frequency (RF) transceiver Integrated Circuit (IC) is provided. The quadrature phase oscillator includes a voltage controlled oscillator and a filter. The voltage controlled oscillator provides an oscillating frequency for modulation of a transmission / reception signal according to an applied voltage. The filter receives the oscillating frequency from the voltage controlled oscillator as an input, passes one of a negative frequency component of the input oscillating frequency and a positive frequency component of the input oscillating frequency, attenuates the other frequency component, generates an I (In phase) signal that is in phase with the input oscillating frequency and a Q (Quadrature phase) signal having a phase difference of 90 DEG with the input oscillating frequency for the passed frequency component, and outputs the I signal and the Q signal.

The invention relates to a spring structure (501) having at least two masses (Ma, Mb) coupled as an anti-phase oscillator in a first direction via springs (Sh1, Sh2), said springs ( Sh1, Sh2) are connected to the mass (Ma, Mb) via a ring structure (L, E) located at the coupling point connected to the ring structure (L, E) between the springs (Sh1, Sh2), wherein the inclined springs (SI45, Sr45) are connected from the coupling point of the ring structure (L) to the holder (A) of the base, so that the ring structure ( The longitudinal movement of L) is arranged perpendicularly or substantially perpendicularly to said first direction so as to dampen anti-phase oscillations of said masses (Ma, Mb) in addition to anti-phase oscillations. The invention also relates to the use of an oscillator and / or an array of oscillators and a sensor and / or a spring structure in a sensor system.

The invention relates to a multi-phase oscillator for generating multiple phase-shifted oscillator signals including: a ring oscillator having a number of concatenated oscillator delay cells which are interconnected to generate an oscillator signal, wherein phase-shifted oscillator signals are generated between the oscillator delay cells; a phase-blending unit configured to receive two phase-shifted oscillator signals and to generate a mid-phase oscillator signal whose phase shift is between the shifts of the two phase-shifted oscillator signals; and an interpolator delay line having a number of concatenated interpolator delay cells to generate further phase-shifted oscillator signals.

The invention discloses a difference frequency coupling damping control method for a transmission line, which mainly changes the original configuration of the traditional three-phase transmission linewith the same tension, the same sag, and the parallel running direction to a transmission line damping configuration with three-phase pay-off tension differences. The tension differences cause frequency differences of three-phase spring oscillators, and damping control on the whole system is realized through frequency difference match and coupling of inter-phase oscillators. In comparison with the original configuration, the sag change amplitude of the transmission line damping configuration is controlled in a moderate range, and safe operation of the line and the overall coordination and beauty of the line type are thus ensured. Through adjusting the pay-off tension of the three-phase transmission line, the large-span flexible structure vibration control problem is well solved.

The invention discloses a frequency doubler which is used for processing a normal phase oscillator signal and an opposite phase oscillator signal for generating a signal of higher frequency on an output end. The frequency doubler comprises a first transistor, a second transistor, a first inductor and a second inductor, wherein the first end of the first transistor and the first end of the second transistor are on the same potential; the normal phase oscillator signal and the opposite phase oscillator signal are respectively input into the frequency doubler by the control end of the first transistor and the control end of the second transistor; the first inductor and the second inductor respectively couple the second end of the first transistor and the second end of the second transistor to the output end of the frequency doubler; and the first inductor and the second inductor can be realized by respectively independent inductance components and also can be realized by a symmetrical inductor with mutual inductance effect.

The present invention provides a quick start-up circuit and a quick start-up method. The fast start-up circuit includes: a multi-phase oscillator, a control circuit, a phase selection circuit, a driving circuit and a crystal oscillator circuit; wherein, the multi-phase oscillator is used to generate a plurality of clocks with different phases; the control circuit is used to generate the initial injection signal and The cycle injection signal is used to control the opening and closing of the driving circuit; the phase selection circuit is connected to the multi-phase oscillator and the control circuit, and is used to select the appropriate phase clock from multiple clocks of different phases according to the cycle injection signal, and pass the driving circuit. Drive the crystal oscillator circuit with the selected clock. In this application, an appropriate phase can be selected for injection to achieve a stable injection effect and start-up speed, which greatly reduces the requirements for the injection clock accuracy; and the same circuit can be applied to crystal oscillators of different frequencies, which not only increases the reliability of the circuit , it also avoids the requirement for the oscillator start-up time and reduces the difficulty of circuit design.