AN922Applications of PIN DiodesApplications of PIN Diodes Application Note 922 Introduction The most important property of the PIN diode is the fact that it can, under certain circumstances, behave as an almost pure resistance at RF frequencies, with a resistance value that can be varied over a range of approximately 1 to 10 K through the use of a DC or low frequency control current. 1. AN 929, Fast Switching PIN Diodes. 2. AN 985, Achieve High Isolation in Series Applications with the Low Capacitance HPND-4005 Beam Lead PIN. 3. AN 957-1, Broadbanding the Shunt PIN Diode SPDT Switch. 4. AN 957-2, Reducing the Insertion Loss of a Shunt PIN Diode. device, while the lifetime [denoted by τ (tau)] determines the approximate low frequency limit of useful application. The conductance of the diode is proportional to the st……