4 results about "Memristor" patented technology

The invention particularly relates to a memristor-based automatic gain control circuit. The technical scheme is as follows: the circuit consists of a variable gain amplification module (1), a comparator (4) and a peak value detection module (5); the variable gain amplification module (1) consists of an operational amplifier circuit (2) and a memristor (3); a terminal M2 of the memristor (3) is connected with an input end Rc of the operational amplifier circuit (2); an input end Vi of the operational amplifier circuit (2) is externally connected with an input signal Vin; an output end VVGA of the operational amplifier circuit (2) is respectively connected with an input end VVGAP of the peak value detection module (5) and the input end Vw of a peripheral circuit; a terminal M1 of the memristor (3) is connected with an output end Vc of the comparator (4); an input end ViVGAP of the comparator (4) is connected with an output end ViVGA of the peak value detection module (5); and an input end VREF1 of the comparator (4) is externally connected with a reference electric level VREF. The memristor based automatic gain control circuit provided by the invention has the advantages of simple structure, low cost and high accuracy.

The invention discloses a subway train voltage fluctuation prevention device. The voltage fluctuation prevention device comprises a voltage transformer 1, a voltage detection module 2, a memristor control module 3, a memristor driving module 4 and a memristor Rm. When the voltage of the pantograph passes through the main transformer, the input voltage is changed, the voltage transformer 1 convertsa voltage signal into a numerical signal through the voltage detection module 2 and sends the numerical signal to the memristor control module 3, and the memristor control module 3 changes the memristor value of the memristor Rm through the memristor driving module 4, so that the stability of the input voltage is realized. The subway train voltage fluctuation prevention device provided can effectively solve the problem of voltage fluctuation existing in contact network power supply, improve the running stability of the subway train and improve the riding comfort of a subway.

The invention relates to a memristor based on a bipolar transistor. The memristor model overcomes the defects that a memristor model designed by adopting an active circuit chip is complex in structureand high in cost in the prior art. A brand-new design structure is adopted, the memristor is composed of the two transistors, the two diodes, the four resistors and the two capacitors, the memristorcircuit has the advantages of being simple in structure, easy to achieve, low in cost and convenient to adjust circuit parameters, and convenience is provided for researchers to research production and application of the memristor circuit.