"Chapter 1 - The Op Amp's Place in the World" - HTL Wien 10

VREF
R1
R2
VIN
RG
_
+
VCC
Transducer to ADC Analog Interface
RF
0.01 µF
Figure 18–9. Schematic for the Transducer to ADC Interface Circuit
The circuit equation is obtained with the aid of superposition.
VOUT VINRF RG R1 R2 V
RG R1 R REF
2
R2 RF R1 R2RG R1 R2 RL
Designing Low-Voltage Op Amp Circuits
VOUT
(18–13)
Comparing terms between Equations 18–12 and 18–13 enables the extraction of m
and b.
m RF RG R1 R2 RG R1 R2 |b| V REF R 2
RF R1 R2RG R1 R2 Making the assumption that R 1||R 2