Tension divider

Constitution

A tension divider bridge consists of two resistances in series. The supply voltage is applied to the whole of resistances while the output voltage east taken at the boundaries of one of them.

Pont tension divider noncharged

In this type of assembly, R1 resistances and R2 are in series. There is no particular problem and the following equation directly is obtained:

$V_ {out} = V_ {in} \ times {R_ {2} \ over {R_ {1} + R_ {2}}}$

Pont tension divider charged

The tension

V_ {out}

can be written:

$V_ {out} = V_ {in} \ times {R_ {2} R_ {3} \ over {R_ {1} R_ {2} + R_ {1} R_ {3} + R_ {2} R_ {3}}}$

When $R_3$ is very large in front of $R_2$ , one can neglect the term $R_ {1} R_ {2}$ compared to $R_ {1} R_ {3}$ , which after simplification by $R_3$ makes it possible to find the equation of the bridge nonabove charged.

Applications

The tension divider bridge is generally used for to condition a signal in order to treat it by a circuit while respecting its dynamics of entry.

See too

Dividing of current
Wheatstone bridge

Simple: Voltage divider

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