10 results about "Digital tuning" patented technology

The application relates to the technical field of integrated circuits, and discloses a digital auxiliary adaptive zero-crossing detection circuit. The circuit comprises a digital auxiliary comparator module, a digital logic module, a detection discrimination module and a counter module. The digital auxiliary comparator module compares a switch node voltage signal with a power ground signal to generate a first output signal; the digital logic module processes the first output signal to generate a zero-crossing detection signal and control the turn-off of a power tube; the detection discrimination module receives a second output signal of the digital logic module and the zero-crossing detection signal to generate a digital tuning signal; and the counter module receives the digital tuning signal to generate a six-digit digital signal, dynamically adjusts a resistance array in the digital auxiliary comparator module, adaptively adjusts the flip offset of the comparator by changing the resistance value of the resistance array, and thus changes the turn-off timing of the power tube. The application can accurately control the turn-off timing of a synchronous rectification power tube, reduce the reverse current and reduce the dynamic power consumption.

A system and method to generate and implement digital tuning files based on p-smooth number sequences for use with a digital musical instrument is provided. A p-smooth number sequence is generated and a subset of p-smooth numbers from the sequence is chosen as a musical octave of musical note frequencies. Each note within the octave is designated as a tonic, and each tonic is used to generate additional musical octaves and corresponding musical note notations. The musical octaves and corresponding musical note notations are stored into the digital memory of the digital musical instrument, and the instrument's native musical note mappings are remapped to the musical octaves and corresponding musical note notations from the digital file.

The present invention provides host cells and vector systems that allow precise tuning of expression of selectable marker expression and increased integrated copy number of product genes so that host cell growth and expression of desired proteins or nucleic acid products from the host cell can be optimized.

The invention relates to the technical field of integrated circuits, and discloses a digital auxiliary adaptive zero-cross detection circuit. The circuit comprises a digital auxiliary comparator module, a digital logic module, a detection and discrimination module and a counter module. Wherein the digital auxiliary comparator module compares a switch node voltage signal with a power ground signal to generate a first output signal; the digital logic module processes the first output signal and then generates a zero-cross detection signal to control the power tube to be turned off; the detection and discrimination module receives the second output signal of the digital logic module and the zero-cross detection signal and then generates a digital tuning signal; the counter module receives the digital tuning signal and then generates a six-bit digital signal, a resistor array in the digital auxiliary comparator module is dynamically adjusted, and the overturning offset of a comparator is adaptively adjusted by changing the resistance value of the resistor array, so that the turn-off opportunity of a power tube is changed. According to the invention, the turn-off time of the synchronous rectification power tube can be accurately controlled, the reverse current is reduced, and the dynamic power consumption is reduced.

Exemplary embodiments of this disclosure include apparatus, systems and methods utilizing a passive, power-efficient backscattering communication system that enables transmitting data wirelessly between implantable magnetoelectric (ME) devices and an external base station. Certain embodiments encode the transmitted data through modulating the resonance frequency of a ME film by digitally tuning its electric loading conditions.

The invention provides a low-power-consumption numerically-controlled oscillator, relates to the technical field of integrated circuits, and comprises a resonant cavity module used for generating a high-frequency resonant signal based on a resonator; the input end of the complementary cross-coupled oscillation module is connected with the resonant cavity module, and the complementary cross-coupled oscillation module is used for receiving high-frequency resonant signals and generating continuous oscillation; a capacitor array of the segmented numerical control capacitor tuning module is connected in parallel to two ends of the resonant cavity module and is used for receiving external numerical control signals and changing equivalent capacitance of a resonant network, so that wide-range and high-precision digital tuning is carried out on oscillation frequency; the parasitic oscillation suppression module is integrated in an internal feedback path of the complementary cross-coupled oscillation module and is used for suppressing direct-current positive feedback and attenuating low-frequency loop gain so as to eliminate direct-current locking and low-frequency parasitic oscillation; the input end of the output buffer module is connected with the output node of the complementary cross-coupling oscillation module, and the output buffer module is used for shaping and driving the oscillation signal and then outputting the signal. In the mode, wide tuning, ultra-low power consumption, high stability and high-precision tuning are realized, meanwhile, the phase noise performance and the mass production feasibility are improved, and the strict requirements of the battery-free Internet of Things node are met.

The utility model provides a radio frequency energy bidirectional digital tuning circuit and a radio frequency energy acquisition system, and relates to the technical field of integrated circuits, and the radio frequency energy bidirectional digital tuning circuit comprises a capacitance increasing circuit, a capacitance reducing circuit and a finite-state machine. Wherein a first port of the capacitance increasing circuit and a third port of the capacitance reducing circuit are connected in parallel; a second port of the capacitance increasing circuit and a fourth port of the capacitance reducing circuit are connected in parallel; the finite-state machine is respectively connected with a bias voltage end of the capacitance increasing circuit and a bias voltage end of the capacitance reducing circuit, and is used for providing bias voltage for the capacitance increasing circuit and the capacitance reducing circuit; the capacitance increasing circuit is used for increasing the capacitance of the radio frequency energy bidirectional digital tuning circuit; and the capacitance reduction circuit is used for reducing the capacitance of the radio frequency energy bidirectional digital tuning circuit. According to the technical scheme of the embodiment of the utility model, bidirectional tuning can be realized, and the working bandwidth of the tuning circuit is expanded.

The invention discloses a digital tuned filter, a digital tuned filtering method and electronic equipment. The digital tuned filter comprises a data interface, a tuning module and a power supply module windowing structure. The data interface is used for receiving information data and a trigger signal; the tuning module is respectively connected with the communication interface and the trigger signal interface, and is used for calculating an address code according to the received information data and preparing a new parameter in a table look-up mode, and is used for responding to the trigger signal and switching to the new parameter and establishing a new filtering state; the power supply module is connected with the tuning module and is used for providing working voltage for the tuning module; and the windowing structure is arranged at the bottom of the digital tuned filter. The tuning performance and reliability of the digital tuned filter can be improved.

The present disclosure provides an oscillator, comprising: a frequency control module, an oscillator module and a tuning interface module; the tuning interface module is electrically connected with the oscillator module and the frequency control module respectively; the frequency control module is used for providing a digital tuning control signal to the tuning interface module; the tuning interface module is used for generating an analog tuning quantity signal according to an obtained clock signal and the digital tuning control signal, and outputting the analog tuning quantity signal to the oscillator module. The present embodiment can accurately represent the compensation quantity required by the physical environmental change by using the digital tuning control signal, and can avoid the noise interference during the analog signal transmission; and in the present embodiment, the digital tuning control signal is converted into the analog tuning quantity signal, which can ensure the continuity of the adjustment of the oscillator module, reduce the frequency jump phenomenon during the compensation of the digital tuning control signal, and improve the stability of the oscillator frequency.

The disclosure relates to a radar unit for use in a distributed coherent DCR automotive radar system. The radar unit includes: a local clock circuit including: an oscillator; and a digital tuning circuit in parallel with the oscillator and comprising a plurality of switchable capacitors; a tuning controller configured to adjust an operation frequency of the local clock circuit by controlling the plurality of switchable capacitors during a non-transmission operation period of the radar unit; and a communication unit configured to transmit and receive data from the central processor unit; wherein the tuning controller is configured to adjust the operating frequency of the local clock circuit in response to the communication unit receiving frequency offset data from the central processor unit, the frequency difference between the operating frequency of the local clock circuit and the operating frequency of a remote clock circuit of the DCR automotive radar system is reduced.