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Tuesday, February 26, 2019

High Stability Reference Mirror

LM399 is a Precision Reference chip. From this a dual polarity mirrored reference is derived using OP07 op-amps. This assembly is mounted in a miniature oven to ensure temperature stability. 

High Stability Reference Mirror

The oven used Two Steel Boxes one mounted in another with Glass Wool In-between to reduce heater losses.  Steel was used to ensure excellent EMI-RFI Shielding. Both the outer and internal shell was earthed.

Instrumentation and Measurement Circuits

Regulated and Filtered Supply to this assembly further ensures consistent performance over the years and in various environments and seasons.

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