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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
Collector-to-base bias: Figure: Collector-to-base bias This configuration uses negative feedback to avoid thermal runaway and stabilize the operating point. In th
Q. Multi-link connection in a network of register? For a multi-link connection in a network of register- controlled exchanges, a register in originating exchange receives addre
what is the application of simple harmonic motion in electrical engineering?
a. Determine how color sync burst and H deflection sync vary in amplitude and frequency. Also explain the difference in timing among the 3.58 MHz color sync burst and 3.58 MHz chro
Q. Find the current flow through a resistor ? Consider the circuit shown in Figure (a). Reduce the portion of the circuit to the left of terminals a-b to (a) a Thévenin equival
Fourier transform (filtering) (i) Perform low pass filtering in the frequency domain. Write and m-file lowfft.m which does this operation. lowfft.m function lowfft im
When a current is passed through a conductor, a magnetic field is created in its surroundings. We can represent this magnetic field by drawing 'field (or 'flux') lines' with two
Points of Verification of Connection i) Phase association ii) CT polarity iii) VT polarity iv) Phase angles v) Phase sequence vi) System conditions - unbalanc
Define Voltage Source Multiplying DAC? Voltage source multiplying DACs use a reference voltage which is switched in or out by the digital data. The converter is so-named becau
Q. Consider a full-wave single-phase bridge recti?er circuit with dc motor load, as shown in Figure (a). Let the transformer turns ratio be unity. Let the load be such that the
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