Re: 4420 driver ICs

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz> 

On 1 Apr 2004, at 8:26, Tesla list wrote:

 > Original poster: Fucian-at-aol-dot-com
 >
 > In a message dated 3/31/2004 11:31:14 PM Eastern Standard Time,
 > tesla-at-pupman-dot-com writes:
 >
 > >Question: are the inputs essentially FET gates? They may hold a
 > >charge which could turn them on the moment the supply rails are
 > >powered-up if the inputs are not connected to anything. Static
 > >sensitivity might also be a problem if they are mishandled.
 > >
 > >Malcolm
 >
 >
 > Umm im not sure what you mean...The input to the 4420?Or the
 > MOSFET?

The input to the 4420.

Malcolm


The input to the 4420 is connected to the antenna...The MOSFET
 > gate is connected directly to the 4420 output via a 10ohm resistor.
 >
 > It seems to be directly linked to the metal enclosure...Dont know why,
 > but im throwing it out...
 >
 > Matt
 >
 >
 >