A2087

THE M-O VALVE COMPANY LIMITED A2087 VHF NOISE GENERATOR DIODE BRIEF DATA A VHF noise generator diode with a tungsten filament. The A2087 is a commercial equivalent of the CV2171. FILAMENT *Filament voltage range Filament current (approx at Vf = 4.3 V) 0-4.3 0.6 V A "The saturated anode current is regulated by variation of the filament voltage. With a 6.3 V filament supply, a variable series resistor of 10 n max. will be suitable for most purposes. MAXIMUM RATINGS Anode voltage. Anode current Anode dissipation Filament voltage. 200 20 2 4.8 V mA W V CHARACTERISTICS Anode voltage. Saturated anode current (approx) Filament voltage (approx) . 40 7 3.7 V mA V CAPACITANCES (measured on a cold valve fitted with external shield) Anode to fi lament (approx) . "Anode to all (approx) . 1.35 2.7 "Includes capacitance to filament, pins 2 & 7 and external shield. pF pF A member of the GEC Group of Companies © 1977 The M-O Valve Co. Ltd. April 1977 Issue 3 TYPICAL OPERATION Noise Diode for use up to 220 MHz Anode voltage Saturated anode current range Filament voltage range (approx) *Source resistance * Noise factor measurement range (approx) 100 0-20 0-4.3 50 0-13 100 0-20 0-4.3 70 0-14.5 100 0-20 0-4.3 300 0-20.8 V mA V 0 dB *When measuring receiver noise factor, using with the diode a source resistance Rs (to match the receiver input) and the technique of setting the value of la(sat) to double the noise output power to the receiver detector, the range of noise...