Abstract
In this paper we analyse the important technical problem when the first order temperature coefficient α of the standard voltage using zener diodes is required to be as small as 10ppm/degree, and then present a solution.
A semiconductor element named the multi-diode is made on trial, applying the temp. characteristics of the forward biased silicon diode. Two kinds of its designs are shown in this paper.
We can regulate the temp. slope of the forward voltage of the multi-diode step by step.We manufactured on trial the mufti-terminal type compensated zener diode by using the multi-diode. As a result of our experiment, we can control the first order temp. coeff. α of the standard voltage by the selection of the terminal of the multi-terminal type comp. zener diode, and then α become less than 5ppm/degree. This device is suitable to supply the standard voltage for the P.I.D. controllers and the digital meters etc.
