In-vehicle communication equipment step-by-step charger

Abstract

Disclosed is a step-by-step charger for vehicle-mounted communication equipment. The step-by-step charger comprises a charging power supply, a charged power supply and a reference voltage, and also comprises a first-stage charging module and a second-stage charging module, wherein the first-stage charging module comprises a first operational amplifier and a first charging device; the second-stage charging module comprises a second operational amplifier and a second charging device; the output ends of the first charging device and the second charging device are connected with a first capacitor and a second capacitor respectively, wherein the other ends of the first capacitor and the second capacitor are grounded; the step-by-step charger also comprises a bleeder circuit; and the bleeder circuit outputs the reference voltage and enables the voltage value of the reference voltage to be between the voltage values of the charging power supply and the charged power supply. By adoption of the step-by-step charger, the ripple wave noise in the power supply charging process is lowered, the data loading density can be increased, and the transmission efficiency of the communication data is improved.

Description

technical field [0001] The invention belongs to the field of electronic communication, and relates to a communication charging device, in particular to a step-by-step charger for a vehicle communication device. Background technique [0002] In various electronic devices, different modules usually require different DC power sources, and usually one DC power source charges other power sources to obtain DC power sources with different potentials. For communication equipment, with the reduction of power consumption and signal voltage amplitude, the noise signal tolerance of the system is getting smaller and smaller, especially when power supply noise is superimposed on the signal, the impact on signal distortion is reflected with the reduction of power supply voltage an increasingly pronounced impact. In vehicle-mounted communication equipment, since the power supply itself is converted from mechanical energy, the power supply itself has strong ripples. In communication with hi...

AI Technical Summary

Problems solved by technology

In vehicle-mounted communication equipment, since the power supply itself is converted from mechanical energy, the power supply itself has strong ripples, and the noise impact is even worse when the communication frequency is high and the information density is high.

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