Patent ID: 6747523
Filing Date: 2004-06-08
Classification: H03B

Abstract:
A circuit comprising:a first varactor having a first anode and a first cathode, said first anode connected to a first node; a second varactor having a second anode and a second cathode, said second anode connected to a second node, said second cathode of said second varactor connected to said first cathode of said first varactor; an inductor connected across said first node and said second node; a first bipolar transistor having a first base, a first emitter, and a first collector, said first base connected to said second node, said first collector connected to said first node; a second bipolar transistor having a second base, a second emitter, and a second collector, said second base connected to said first node, said second collector connected to said second node; a first FET having a first gate, a first drain, and a first source, said first source connected to said first node, said first drain comprising a first output of said circuit; a second FET having a second gate, a second drain, and a second source, said second source connected to said second node, said second gate connected to said first gate, said second drain comprising a second output of said circuit.