Konica Minolta PCI-1712 사용자 설명서

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However, this connection has the disadvantage of loading the source
down with the series combination (sum) of the two resistors.  For r

a

 and

r

b, 

for example, if the input impedance r

s 

is 1 k

Ω

, and each of the two

resistors is 100 kW, then the resistors load down the signal source with
200 k

Ω

 (100 k

Ω

 + 100 k

Ω

), resulting in a –0.5% gain error.  The following

gives a simplified representation of the circuit and calculating process.