Hi Shane:No. It's a long lifetime PIN. Limiter PINs must have a lifetime short enough that they have some retification efficiency.
See attached schematic. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam Shane wrote:
I'm a little curious about the limiter mentioned below.In laymen's terms would this be pairing a schottky diode and limiter PIN inseries or parallel?I've seen designs with different pins (course and fine) in parallel to actas clean ups.If you use DC blocks and no DC return... Could you effectively forward bias the PIN in parallel by rectifying a reverse polarity schottky with the proceeding negative AC cycle?Sorry if it's a silly question, I need to review some elementary circuitstuff. -----------------------A PIN diode shunt clamp can be used, however it will take a while torespond so some other means to clamp the unwanted energy during the time it takes to turn on the PIN diode clamp may be necessary.One way to do that is pair up a long lifetime PIN and a schottky of polarities such that the Schottky current forward biases the PIN. DC block the input and output. I made microwave limiters this way many decades ago. Re: Schottky Diodes There are two flavors. A pure Schottky diode is made up of a single metal semiconductor junction. These typically have reverse breakdown voltages in the 3 to 5 volt area. If a "Schottky" diode has a higher Vbr then it's what's called a "Guard Ring" type. These have a P/N junction surrounding the schottky junction that increases the reverse breakdown and another P/N junction to isolate the two forward curves. Sometimes these are made improperly where the second PN junction gets shorted and then there's a "double break" in the forward I-V curve and charge storage (slow operation) is associated with them. When HP first introduced microwave Schottky diodes they put a reverse recovery time spec on them when in fact it was zero. For more on Microwave Diodes see: http://www.prc68.com/I/Diodes.html _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
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