5 results about "Voltage controlled resistor" patented technology

The present invention provides a non-volatile semiconductor memory device and a current-assisted voltage-controlled resistor that can supply an optimal voltage to each memory cell according to the state of the memory cell. [Solution] The non-volatile semiconductor memory device has a resistor element 10 and a current assist element arranged in parallel between the first voltage control line VCL1 and the second voltage control line VCL2, so that the optimal voltage can be supplied to each antifuse memory M arranged in the row direction via either the resistor element 10 or the current assist element depending on the state of the antifuse memory M.

This application provides a voltage-controlled resistor (VCR) adjustable termination resistor circuit and system based on mirror control, relating to the field of high-speed serial transmitter design technology. It includes: a working path, a mirror path, and a control loop; the mirror path and the working path operate in the same environment; the control loop applies control voltages to the VCR in the working path and the mirror VCR in the mirror path respectively to control their resistance values; the control loop compares the critical node voltage at the output of the mirror VCR with the reference voltage of a reference voltage source, and outputs a control voltage based on the real-time voltage deviation. The voltage-controlled resistor (VCR) adjustable termination resistor circuit and system provided in this application uses a mirror backup termination resistor to detect the impedance of the termination resistor in real time, and adjusts the termination resistor value in real time when the chip voltage and temperature change, to meet the termination resistor requirements of the high-speed serial interface.

The invention relates to the technical field of electromagnetic interference suppression, and discloses an electromagnetic interference suppression circuit based on a chaos resistor and a switching power supply, and the circuit comprises a chaos generation circuit, a chaos modulation circuit and a comparator circuit which are connected in sequence. The chaos generation circuit comprises a chaos voltage generation circuit and a voltage-controlled resistance circuit which are connected in sequence, and the voltage-controlled resistance circuit is connected with the chaos modulation circuit; the chaotic modulation circuit and the comparator circuit are connected with the switching power supply. According to the invention, through chaotic modulation control, electromagnetic interference of fundamental frequency and harmonic wave parts is substantially reduced, through wide spectrum expansion, high-frequency noise is reduced, electromagnetic compatibility of a switching power supply is effectively improved, stability and reliability of equipment in a strict electromagnetic environment are enhanced, and meanwhile, an analog circuit is adopted to realize chaotic modulation, so that the reliability of the equipment is improved. Compared with the prior art, signal delay is reduced, the complexity of a control system is simplified, and the method has higher stability and response speed, can be compatible with various power supply topologies and application scenes, and has good universality.

The application discloses a kind of LDO composite zero point tracking compensation circuits, including error amplifier (AMP1), buffer (BUF), compensation MOS tube (Mc), compensation capacitor (Cc), first resistance (R1), second resistance (R2), first MOS tube (M11), second MOS tube (M12), third MOS tube (M13), fourth MOS tube (M14), fifth MOS tube (M15), sixth MOS tube (M16), seventh MOS tube (M17) and eighth MOS tube (M18).The application can improve the technical problem that the movement rate of single voltage-controlled resistance generated zero point and output pole does not match, make the movement rate of zero point also proportional to load current, ensure that the movement rate of zero point and the movement rate of output pole are same, so as to realize the global effective compensation of LDO completely.

The invention discloses a voltage-controlled variable resistor device which comprises a first switching tube, a voltage dividing module, a voltage-adjustable power supply module, a switching module and a voltage following module, the switching module is electrically connected with the first switching tube, the voltage dividing module, the voltage adjustable power supply module and the voltage following module; the switching module is configured to execute the following steps: enabling the first switching tube, the voltage dividing module and the voltage adjustable power supply module to form a voltage range determining circuit; in the voltage range determination circuit, under the condition that a first switching tube is in a variable resistance region, a voltage output range of a voltage-adjustable power supply module corresponding to the resistance change of the first switching tube is determined; the switching module is further configured to execute the following steps: enabling the first switching tube, the voltage-adjustable power supply module and the voltage following module to form a voltage-controlled resistor circuit; in the voltage-controlled resistor circuit, the voltage-adjustable power supply module outputs voltage within a voltage output range, and the first switching tube is used as a variable resistor in the load circuit.