Measurement of frequency by wein''s bridge, Electrical Engineering

Q. Explain the measurement of frequency in detail by using Wein's bridge.

Sol. The Wein's bridge is presented here not only for its use as an AC bridge to measure frequency but also for its application in various other useful circuits.

We find, for example a Wein's bridge in the harmonic distortion analyzer, where it is used as a notch filter, discriminating against one specific frequency.

The Wein's bridge has a series of RC combination in the adjoining arm.

It most Wein's bridge circuits, the components are chosen such that. This reduces equation for the frequency of the bridge. In a practical bridge, capacitors C1 and C3 are fixed capacitors and resistors R1 and R3 are variable resistors controlled by a common shaft. Provided now that the bridge may be used as a frequency determining devices, balanced by a single control. This control may be calibrated directly in terms of frequency.

] Because of its frequency sensitivity, the Wein's bridge may be difficult to balance (unless the waveform of the applied voltage is purely sinusoidal), since the bridge is not balanced for any harmonics present in the applied voltage, these harmonics will sometimes produce an output voltage masking the true balance point.

 

 

Posted Date: 7/12/2012 6:10:26 AM | Location : United States






Your posts are moderated
Related Questions
Q. With a cross sectional view, explain the working of a depletion type MOSFET Draw a biasing amplifier circuit DEPLETION-TYPE MOSFET: Two types of FETs: JFETs and MOSFETs. MOS

Among copper and mercury which is better conductor of electricity?

Complete Instruction Set of 8085 Microprocessor There are  total 256 instructions in  8085 microprocessor. These instructions are classified  into  seven categories  according

Q. Describe some of the features hindering developing countries from growing faster. Answer: One of the features that are able to be hold developing countries from growing fas

Energy Bands 1) Since isolated atoms are brought together to make a solid, the electron wave functions begin to overlap. 2) Several interactions occur, and, at the proper i

Q. Show Step-motor control system? Figure illustrates a system in which the prime mover used in the disk-drive system is a step motor driven by pulse commands. In response to e

Q. On a CD amplifier R s = 4k?, µ =50 and r =35k?. Evaluate the voltage gain A v . A v = V o /V i = µRs / (µ+1)Rs + r


Common Source Amplifier A common-source amplifier is one of three basic single-stage field-effect transistor abbreviated as FET amplifier topologies, commonly used as a volta

On running the simulation, a data display will automatically open, similar to that shown in figure. The red circle is the source mismatch stability curve. This will give an indicat