1.7 Attenuators
What is Attenuators? Attenuators are passive devices. It is convenient to discuss them along with decibels....
Tag: Free Book on AC
1.6 Absolute dB scales
Decibel as Absolute Unit of Power It is also possible to use the decibel as a unit of absolute power, in addition to...
1.5 Decibels
The Bel is Used to Represent Gain In its simplest form, an amplifier’s gain is a ratio of output over input. Like all...
1.4 Amplifier Gain
The Voltage Gain Because amplifiers have the ability to increase the magnitude of an input signal, it is useful to be...
1.3 Amplifiers
Practical Benefit of Active Devices The practical benefit of active devices is their amplifying ability. Whether the...
1.2 Active Versus Passive Devices
Passive Devices Components incapable of controlling current by means of another electrical signal are called passive...
1.1 From Electric to Electronic
Introduction This third volume of the book series Lessons In Electric Circuits makes a departure from the former two in...
14.8 Waveguides
A waveguide is a special form of transmission line consisting of a hollow, metal tube. The tube wall provides...
14.7 Impedance Transformation
Standing waves at the resonant frequency points of an open- or short-circuited transmission line produce unusual...
14.5 Long and Short Transmission Lines
In DC and low-frequency AC circuits, the characteristic impedance of parallel wires is usually ignored. This includes...
14.4 Finite-length Transmission Lines
A transmission line of infinite length is an interesting abstraction, but physically impossible. All transmission lines...
14.3 Characteristic Impedance in Transmission lines
The Parallel Wires of Infinite Length Suppose, though, that we had a set of parallel wires of infinite length, with no...
14.2 Circuits and the Speed of Light
Suppose we had a simple one-battery, one-lamp circuit controlled by a switch. When the switch is closed, the lamp...
14.1 A 50-Ohm Cable?
Early in my explorations of electricity, I came across a length of coaxial cable with a label of “50 ohms” printed...
13.12 AC Commutator Motors
Charles Proteus Steinmetz’s first job after arriving in America was to investigate problems encountered in the design...
