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Q. Explain Inductorless Filters
Inductorless (Active) Filters
Filters (used to pass or eliminate certain frequency components of a signal) that are suitable for IC fabrication, but which do not contain inductors, are known as active filters. They have the op amp as a common component. Figure 5.4.13 shows the basic op-amp circuit with frequency-dependent impedances. The voltage gain or voltage transfer function of this circuit is given by
with Zi = Ri and Zf = Rf (1/j ωCf ) (i.e., Rf and Cf in parallel). We have a low-pass filter with
is sketched in Figure 5.4.14, from which one can see that at the half-power or 3-dB point of fl, the dc value Rf /Ri goes down by a factor of 1/ √ 2 or 0.707. With Zf = Rf and Zi = Ri + 1/j ωCi (i.e., Ri and Ci in series), we have a high-pass filter for which we obtain
Low Pressure Gas Hazards : Safety screens and wire-mesh guards should be placed round evacuated glassware and safety goggles or a face shield must be worn against the possibility
Consider a simple zener voltage regulator with the circuit diagram shown in Figure (a). (a) For a small reverse resistance R Z S and V S - R S i out > V Z , show that v ou
Variable Frequency Systems In this systems the chopping period T will varying but either Ton is kept constant or T off kept constant. In any case the off time T off w
Q. Internal Frequency Compensation of operational amplifier? Some op amps, such as the 741, have internal RC networks which are intentionally designed to reduce gain at high fr
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The mobility of free electrons and holes for pure silicon are 0.13 and 0.05 m2/V-S respectively. Find the intrinsic conductivity for silicon. Assuming ni = 1.5x 1016/cm3 at room te
You have a motor that is powered by 24 VDC. It free-runs at 600 radians/second, and stalls with a load of 125 in-lbs. The time constant (τ) of the motor itself is 1.5 seconds. T
Explain the working principle, Surface finish, material removal, accuracy,advantages and application of Electrochemical Grinding(ECG). (a) In electro chemical machining of pure
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