PIN diode circuit and PIN diode attenuator

摘要

A PIN diode circuit comprising a RF input coupled to a first junction point via a first DC blocking circuit and a constant voltage source coupled to the first junction point via a first DC feeding circuit, the constant voltage source configured to DC bias the first junction point. The PIN diode circuit further comprises a first PIN diode with an anode coupled to the first junction point and a cathode coupled to an anode of a second PIN diode via a second DC blocking circuit. The cathode of the second PIN diode is configured to be coupled to ground potential. The PIN diode circuit further comprises an adjustable voltage source coupled to a second junction point via a second DC feeding circuit. The second junction point is coupled to the cathode of the first PIN diode via a first resistor and is further coupled to the anode of the second PIN diode via a second resistor.

主权项

1. A PIN diode circuit comprising:
a RF input coupled to a first junction point via a first DC blocking circuit; a constant voltage source coupled to the first junction point via a first DC feeding circuit, wherein the constant voltage source is configured to DC bias the first junction point;
a first PIN diode with an anode thereof coupled to the first junction point and a cathode thereof coupled to an anode of a second PIN diode via a second DC blocking circuit, wherein the cathode of the second PIN diode is configure to be coupled to ground potential;an adjustable voltage source coupled to a second junction point via a second DC feeding circuit, wherein the second junction point is coupled to the cathode of the first PIN diode via a first resistor, the second junction point is further coupled to the anode of the second PIN diode via a second resistor;whereby the RF resistance of the first PIN diode and the second PIN diode are controlled by means of adjusting the voltage of the adjustable voltage source between ground potential and the constant voltage provided by the constant voltage source at the first junction point.