Just thinking why would you reinvent a transistor/zener reference when the industry's voltage reference chips are in the $2.00 or less single quanities with performance far exceeding anything previously available in discrete components??
-----Original Message----- From: Dave M <[email protected]> To: FEBO Volt-Nuts <[email protected]> Sent: Sat, Sep 12, 2015 1:58 pm Subject: [volt-nuts] Making a Reference IC I was looking at the schematics for the Fluke 731 and 732 voltage references. these, and several other brands and models of voltage references, use the same or similar reference ICs as their basis. The reference ICs are a Zener/NPN transistor pair on a single substrate. Please view in a fixed-width font such as Courier. | | C | | | | |---- | B /| / | E | | +--------------- | /------/ / ------ | | Just thinking... would it be possible to make a reference with similar characteristics with discrete components (a low tempco Zener and a transistor)? They would likely have to be closely coupled thermally and maintained at a constant temperature within an oven or by a peltier device. What criteria would apply to the selection of the parts? Dave M _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
