Patent ID: 11894842
Assignee: SEARCH FOR THE NEXT LTD
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of operating a circuit, wherein the circuit comprises a bipolar transistor, a diode having a first terminal connected to a base terminal of the bipolar transistor; and a second terminal of the diode connected to a reference voltage, and wherein a voltage is applied across an emitter of the bipolar transistor and the second terminal of the diode, the method comprising:
switchably connecting the base terminal of the bipolar transistor and the first terminal of the diode to a signal source having an impedance lower than the impendence across an emitter and base terminals of the bipolar transistor such that:
when not connected causing a current flow through the base terminal of the bipolar transistor and through the diode to turn the transistor ON; or
when connected, current flow through the base of the bipolar transistor reduces to switch the transistor OFF.