Looking, in a magazine, at the circuit diagram for a lead-acid battery maitenance charger and quoting from the text: '' The reference voltage is derived from the 5V line, which is regulated by IC1, via potential divider R2-R3-P1-D3-D4. Diodes D3 and D4 provide the requisite temperature compensation.'' Is this enough information for anyone to tell me how these diodes ( in series ) work and would this be circuit or ambient temperature?
Many thanks.
Many thanks.