The output voltage of circuit can be linearly adjusted

The utility model relates to the technical field of new energy battery replacement. The utility model relates to a circuit, in particular to a circuit with linearly adjustable output voltage. Automatic linear adjustment of the output voltage is realized; the accuracy of output voltage adjustment is improved; the technical scheme is summarized. The circuit comprises a control signal input end, a voltage output end, a control voltage sampling module, an output voltage sampling module and a feedback adjustment circuit module. The control signal input end is connected with the control voltage sampling module; the feedback adjustment circuit module comprises a controllable voltage stabilizer, an optical coupler, a control chip, a DC-DC converter and a rectifier filter. The control voltage sampling module is connected with the controllable voltage stabilizer; wherein the output voltage sampling module is connected with the controllable voltage stabilizer, the voltage output end is connectedwith the optocoupler, the