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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
Thermal noise This is the most significant noise in an ampli?er. It is produced by random movements of electrons in the resistors. This is caused by the ?uctuations in the volt
For large number of measurements the mean is calculated by taking a sample. Each sample that is taken has a mean. The mean of various sample difference from sample and are known to
Name the materials used in case of Solder and give reasons. Solder : For soft solders tin, lead (in 50-50 ratio) alloy and for hard solders copper- zinc and silver alloy
atomic absorption theory
Q. For the CS JFET ampli?er circuit of Figure, R D = 2k and R L = 3k. The JFET with ro = 15 k has a voltage gain A v1 =-4.5 when the entire source resistance is bypassed. Fin
One circuit has resistor 40? connected in series with inductor 15H and dc voltage 220V. Calculate: i) Time constant ii) Current at time (i) iii) Current at time 0.0
Differentiate between synchronous and asynchronous types of serial communication. Serial data communication uses two fundamental types as, synchronous and asynchronous. With
Data transfer code for OSI layers in matlab?
what is the application of thermodynamics in electrical engineering?
In terms of negative feedback, there exists an analogy between the operational amplifier and the power-steering mechanism of an automobile. The hydraulic pump is analogous to the p
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