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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. Find the exponential form of the Fourier series of the periodic signal given in Figure. Also determine the resulting series if T = 2τ .
Explain explanatory notes on comparison of RS232C and RS422A standards. Comparison of RS232C and RS422A standards: RS232C 1. Standard explained for asynchronous commu
EXPLAIN UJT WITH ALL SUBTOPICS CONSISTS
Unconditional Return RET Instruction: This instruction is used to transfer the program sequence from subroutine to the calling program unconditionally. The instruction forma
Q. In plotting a hysteresis loop the following scales are used: 1 cm = 400 At / mand 1 cm=0.3 T. The area of the loop for a certain magnetic material is found to be 6.2 cm 2 . Calc
Determine a normalized frequency at 820nm for a step index fibre having 25µm core radius. Given n 1 =1.48 and n 2 =1.46.Also calculate how several modes propagate within this fibre
Q. What do you mean by Frequency response? Now let us examine the response of a circuit to a sinusoidal source, called an oscillator, whose frequency can be varied.Known as the
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
What are the hardware elements in the embedded systems? Hardware Elements in the Embedded Systems are as follows: (i) Power Source (ii) Clock Oscillator Circuit and Clock
what is the definition of logic gates
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