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A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider ). [ 1 ]
In power supply design, a bridge circuit or bridge rectifier is an arrangement of diodes or similar devices used to rectify an electric current, i.e. to convert it from an unknown or alternating polarity to a direct current of known polarity. In some motor controllers, an H-bridge is used to control the direction the motor turns.
A standard Wheatstone bridge for comparison. Points A, B, C and D in both circuit diagrams correspond. X and Y correspond to R 1 and R 2, P and Q correspond to R 3 and R X. Note that with the Carey Foster bridge, we are measuring R 1 rather than R X. Let ℓ 1 be the null point D on the bridge wire EF in percent.
Pages in category "Bridge circuits" ... Wheatstone bridge; Wien bridge; Z. Zobel network This page was last edited on 1 April 2018, at 18:01 (UTC) ...
A Maxwell-Wien bridge. A Maxwell bridge is a modification to a Wheatstone bridge used to measure an unknown inductance (usually of low Q value) in terms of calibrated resistance and inductance or resistance and capacitance. [1] When the calibrated components are a parallel resistor and capacitor, the bridge is known as a Maxwell bridge.
Expressed as percent of full scale output per degree of °F or °C. Input Resistance: Input resistance of the load cell's bridge circuit. Measured at the positive & negative excitation leads with no load applied. Measured in Ohms. Output Resistance: Output resistance of the load cell's bridge circuit.
Meacham's circuit included a quartz crystal oscillator and a lamp in a Wheatstone bridge. In Meacham's circuit, the frequency determining components are in the negative feed back branch of the bridge and the gain controlling elements are in the positive feed back branch. The crystal, Z 4, operates in series resonance. As such it minimizes the ...
The Wien bridge is a type of bridge circuit that was developed by Max Wien in 1891. [1] The bridge consists of four resistors and two capacitors . At the time of the Wien bridge's invention, bridge circuits were a common way of measuring component values by comparing them to known values.