ARP 4002 Exponential Sub-Module
The 4002 was an encapsulated PNP-based exponential current generator current sink).
SCHEMATIC- (click on image to download full-sized version)
* - TZ-81 alternate part was the 2N5249, also defunct. 2N3904 would be a modern equivalent.
** - TZ-581 alternate part was the 2N5367, also defunct. 2N3906 would be a modern equivalent.
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