The Relationship Between Rise Time and Bandwidth

Rise Time and Bandwidth? Because a rectangular wave such as a square wave theoretically contains an infinite number of harmonics, we can use a square wave as the basis for determining the bandwidth of a signal. If the processing circuit should pass all or an infinite number of harmonics, the rise and fall times of … Read more The Relationship Between Rise Time and Bandwidth

Pulse Spectrum | Characteristic | Properties

Explanation of Pulse Spectrum? The Fourier analysis of binary pulses is especially useful in communication, for it gives a way to analyze the bandwidth needed to transmit such pulses. Although theoretically, the system must pass all the harmonics in the pulses, in reality, relatively few must be passed to preserve the shape of the pulse. … Read more Pulse Spectrum | Characteristic | Properties

The Importance of Fourier Theory

What Is Importance of Fourier Theory? Fourier analysis allows us to determine not only the sine wave components in any complex signal but also how much bandwidth a particular signal occupies. Although a sine or cosine wave at a single frequency theoretically occupies no bandwidth, complex signals obviously take up more spectrum space. For example, … Read more The Importance of Fourier Theory

Time Domain Versus Frequency Domain

Difference Between Time Domain and Frequency Domain Most of the signals and waveforms that we discuss and analyze are expressed in the time domain. That is, they are variations of voltage, current, or power with respect to time. All the signals shown in the previous illustrations are examples of time-domain waveforms. Their mathematical expressions contain … Read more Time Domain Versus Frequency Domain

Explain Fourier Theory | Properties | Advantages

What is Fourier Theory? Fourier Theory Background:- The mathematical analysis of the modulation and multiplexing methods used in communication systems assumes sine wave carriers and information signals. This simplifies the analysis and makes operation predictable. However, in the real world, not all information signals are sinusoidal. Information signals are typically more complex voice and video … Read more Explain Fourier Theory | Properties | Advantages

Switched Capacitor Filters | Commutating Filters

What is Switched Capacitor Filters? Switched capacitor filters (SCFs) are active IC filters made of op amps, capacitors, and transistor switches. Also known as analog sampled data filters or commutating filters, these devices are usually implemented with MOS or CMOS circuits. They can be designed to operate as high-pass, low-pass, bandpass, or bandstop filters. The primary … Read more Switched Capacitor Filters | Commutating Filters

Crystal Filters and Ceramic Filters

What is Crystal Filters? The selectivity of a filter is limited primarily by the Q of the circuits, which is generally the Q of the inductors used. With LC circuits, it is difficult to achieve Q values over 200. In fact, most LC circuit Qs are in the range of 10 to 100, and as … Read more Crystal Filters and Ceramic Filters

Active Filters | Schematic symbols | Characteristics

What Are Active Filters? Active filters are frequency selective circuits that incorporate RC networks and amplifiers with feedback to produce a low-pass, high-pass, bandpass, and bandstop performance. These filters can replace standard passive LC filters in many applications. They offer the following advantages over standard passive LC filters. Gain. Because active filters use amplifiers, they … Read more Active Filters | Schematic symbols | Characteristics

Types of Filters | Mechanical | Band Reject | Bandpass

What Are types of Filters? The major types of LC filters in use are named after the person who discovered and developed the analysis and design method for each filter. The most widely used filters are Butterworth, Chebyshev, Cauer (elliptical), and Bessel. Each can be implemented by using the basic low- and high-pass configurations are … Read more Types of Filters | Mechanical | Band Reject | Bandpass

Filter | Low High Pass | RC Notch | LC

What is Filter? A filter is a frequency-selective circuit. Filters are designed to pass some frequencies and reject others. The series and parallel resonant circuits reviewed in Section 2-2 are examples of filters. There are numerous ways to implement filter circuits. Simple filters created by using resistors and capacitors or inductors and capacitors are called … Read more Filter | Low High Pass | RC Notch | LC