Patent ID: 6160693
Filing Date: 2000-12-12
Classification: H03K

Abstract:
A power control (20, 40) for controlling the power fed from a voltage source (12) to a load (13), the power control comprising a field effect transistor (21, Q1) for allowing or disabling the flow of electric current from the voltage source to the load as a response to the presence or absence respectively of a control pulse sent to the gate of the field effect transistor, characterized in that the power control comprises means (24, R6, R7) for measuring the change of the field effect transistor gate potential in relation to the voltage over the field effect transistor between the source and the drain and means (25, 26, Q5, Q6, R8, R9, D3, Q3, Q4, D1) for allowing or disabling said control pulse on the basis of the measurement of the gate potential change.