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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
Q. What is Barkhausen criterion? Why is the value of Ab kept slightly greater than 1? The condition |Ab| = 1 is called the Barkhausen criterion. It implies that when |Ab| = 1,
Problem: a) Explain types of "Addressing Modes". b) What is the difference between "Rotate" and "Swap" Operations? c) A computer spends a lot of time in moving data from
Q. The truth table for F(A,B,C) = Mi (0, 1, 6, 7) is as follows: (a) Express F in a canonical product-of-sums form. (b) Minimize F in a POS form and obtain a possible re
#question.draw the block diagram pf digital storage oscilloscope and briefly discuss about each block
Equivalent Circuit : The equivalent circuit of a UJT is shown in fig. The P - N junction represented in the emitter by a diode. Silicon bar being lightly doped has a high res
Light Triggering When light is thrown on silicon the hole electron pair get excited an increases hence the leakage current of J 2 increases which will increase I C1 a
Hybrid parameters (or) h - parameters:- If the input current that is denoted as i 1 and output Voltage that is denoted as V 2 are takes as independent variables, input v
Q. Define Transconductance? The control that the gate voltage has over the drain current is measured by the transconductance gfs and is similar to the transconductance gm of t
why very high resistance wire is used is field windind and low resistance wire is used in armature winding in DC shunt machine?
What''s the formula for the VB2'' in a UJT?
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