6 results about "Negative voltage" patented technology

A system for activating and deactivating a remotely controlled vehicle starter includes a handheld mobile communication device having at least a speaker mounted therein and a wireless transmitter having at least a start switch mounted therein. A first wire connects a negative voltage supply path to the speaker circuit with a negative voltage supply path to the start switch circuit. A variable resistor is provided and has a pair of end terminals. There is a second wire having each of a first end thereof electrically connected to a positive voltage supply path to the speaker circuit and an opposed second end thereof electrically connected to one terminal end of the variable resistor. A third wire is also provided to connect an opposed end terminal of the variable resistor to a positive voltage supply path to the start switch.

The invention discloses a negative voltage chip. The negative voltage chip comprises a negative voltage conversion circuit and a negative voltage processing circuit, wherein the negative voltage conversion circuit is used for converting an input positive voltage into a negative voltage with the same voltage value, and outputting the negative voltage; and the negative voltage processing circuit is used for receiving the negative voltage outputted by the negative voltage conversion circuit, calculating and processing the negative voltage under the action of an external input signal, and outputting a negative voltage meeting the work conditions of an EML (eroabsorption modulated laser), wherein the negative voltage conversion circuit and the negative voltage processing circuit are arranged in a same package. The negative voltage chip provided by the invention can be used specially for providing a work voltage for the EML in a light transceiver module, and has the advantages of high integration degree and low cost. The negative voltage chip does not need external excessive matched circuits so as to make room for integrating other function circuits in the light transceiver module, thereby simplifying the circuit structure for providing the work voltage for the EML in the light transceiver module.