A voltage divider circuit (divider circuits) basic deperlihatkan at 2:25 GABAR often used to convert (transform) that varies the resistance value into a voltage that varies as well. The relationship of the output voltage divider circuit VD, resistors (R 1, R 2) and a voltage source (VS) is:
Figure 2.24 A simple voltage divider circuit
Bridge circuit (bridge circuit) is used to convert the varying impedance into a voltage that varies as well. One advantage of using this bridge circuit is may be designed to produce a voltage signal that varies with the ground (the voltage is zero). If the car then the car body or minus batteries into the ground. This means that the reinforcement can be used to increase the voltage level to increase the sensitivity of the impedance varies.
2:26 image shows a bridge circuit called Wheatstone bridge. This circuit is used for signal conditioning applications where a sensor that converts the resistance into a voltage as a variable process, becomes the input to the controller previously compared to a reference (see block diagram of the control system is closed in figure 9.3).
2:25 image Wheatstone bridge circuit DC Primary
Many modifications made to the bridge circuit this basis for more specific applications. In Figure 2:25, the object to be labeled D is a voltage detector (vlotage detector) is used to compare the voltage (potential) at a point between a and on the circuit. In modern applications, the detector is a differential amplifier with high input impedance. In this case the potential difference (ΔV) between points a and b are formulated into where:
V a = Voltage point A to point C (ground or reference voltage)
V b = Voltage point b to point c (ground or reference voltage)
2:26 Picture passive filter circuit
The value of V A and V B can now be determined, where V a is a voltage source V divided by R 1 and R 3
in the same way, the V b, a voltage divider is given by
Where
V = the voltage source circuit.