Zero-current-loss single-tube grid-control circuit with pre-voltage-stabilization function

The invention discloses a pre-voltage-stabilizing zero-current-loss single-tube grid-control circuit. The pre-voltage-stabilizing zero-current-loss single-tube grid-control circuit comprises a rear-end circuit and an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) device electrically connected with the rear-end circuit, the threshold voltage of the MOSFET device is a zero limit value; and the gate voltage control of the MOSFET device is adopted to carry out pre-voltage stabilization so as to provide a pre-voltage-stabilization potential for the rear-end circuit. Pre-voltage stabilization can be achieved only through an MOSFET device with the threshold voltage being the zero limit value or a depletion type MOSFET device, positive gate voltage control and back gate voltage control are used for achieving pre-voltage stabilization, an extra current branch is not introduced into the pre-voltage-stabilization part, current consumed by the pre-voltage-stabilization part is inherent current loss of a syste