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Here is some important ADVANTAGES and DISADVANTAGES OF RC PHASE SHIFT OSCILLATORS ADVANTAGES OF RC PHASE SHIFT OSCILLATOR. 1. It is cheap and simple to design because it contains only one transistors with some Resistors and Capacitors. 2. It provides good Frequency stability. 3. Circuit is simpler than other OSCILLATOR. 4. It doesn't need any negative feedback and stabilisation arrangements. 5. The output is Sinusoidal so it is quite Distortion Free. 6. Having wide operating Frequency range. 7. Also suitable for low Frequencies. DISADVANTAGES OF RC PHASE SHIFT OSCILLATOR. 1. The output is small due to smaller feedback. 2. It is difficult for the Circuit to start oscillations. 3. The Frequency stability is not so Good. 4. It requires high Vcc. For large feedback. Back to MYCIRCUITS9

Advantages and Disadvantages of Moving Iron Instruments Advantages 1.        The instrument can be used both on DC as well as on AC circuits. 2.        These instruments are cheap, robust and simple in construction. 3.        The instruments have high operating torque. 4.        The instruments are reasonably accurate. 5.        These instruments can withstand overload momentarily. Disadvantages 1.        Scales of these instruments are not uniform because of pneumatic damping. 2.        Errors are introduced due to change of frequency I case of A.C. 3.        Errors are introduce due to hysteresis and stray magnetic field. 4.        Power consumption is high.

Direct Coupled Amplifier The direct coupled amplifier suits well for very low frequency applications. Since the circuit especially works at low frequencies, the coupling capacitor and transformers are not used because the electrical size of these components become very large at these frequencies. The above fig shows the circuit of three stage direct coupled amplifier. It uses complementary transistor. Thus, the first stage uses npn transistor, the second stage uses pnp transistor and so on. In this circuit the output of first transistor is directly connected to the input of second transistor. Working: The weak signal is applied to the input of first transistor T 1 . Due to transistor action, an amplified output is obtained across the collector load R C of transistor T 1 . This voltage drives the base of the second transistor and amplified output is obtained across its collector load. In this way, direct coupled amplifier raises the strength of weak signal. Advantages and Disadvantages...

ADVANTAGES OF CLASS A PUSH PULL AMPLIFIER → Because of the absence of even harmonics in the output it gives more output per active devices for a given amount of distortion or less distortion for a given output per transistor. → Eliminates Non-linear Distortion, that may arise due to the curvature of transformer magnetization curve. → Lower ripple Voltage DISADVANTAGES OF CLASS A PUSH-PULL AMPLIFIER The drawbacks of push-pull amplifiers are:- → Requirement of two identical or matched transistors. → It need the use of driver stage to furnish two equal and opposite voltages at the input → It requires Bulky and expensive Transformers Back To HOME

Advantages and Disadvantages of Dynamometer Type Instruments Advantages: 1.        These instruments are free from hysteresis losses and eddy current losses. 2.        They have a precision grade accuracy. 3.        These instruments can be used on both A.C and D.C. They are also used as a transfer instruments. 4.        Electrodynamometer voltmeters are very useful where accurate RMS values of voltage, irrespective of waveforms, are required. Disadvantages: 1.        They have a non-uniform scale. 2.        These instruments have a low sensitivity due to a low torque to weight ratio. 3.        They are more expensive than either the PMMC or the M.I type instruments. 4.        These instruments are sensitive to overloads and mechanical impacts. Theref...