Visual Display Units (VDUs): Large arrays of characters can be built up using alphanumeric devices, already discussed, but the number of connections and the complexity of the drive-logic circuitry increase…
Photoemissive cells or Tubes - Working Principle and Types: These Photoemissive cells or Tubes devices are basically of two types namely vacuum type and gas filled type. 1. Vacuum Type…
Light Dependent Resistors (LDRs) - Definition, Construction, Workings and Applications: Light dependent resistors (LDRs) are made from cadmium sulphide containing no or very few free electrons when not illuminated. Its…
What is Optoelectronic Devices? Optoelectronics is the technology that combines optics and electronics and the devices based on this technology are known as optoelectronic devices. These devices include emitters, sensors…
Classification of Pulse Signals: The Classification of Pulse Signals are divided into four categories, namely Periodic signals. Aperiodic signals. Random signals. Continuous and Discrete Signals 1. Periodic Signals: Periodic signals…
Time Base Generator - Working Principle and Types: Time base is an axis, normally X-axis, that is used to represent time so that variations of quantities such as voltages, currents…
What is Clipper Circuit? - Definition and Classification Clipper Circuit is one which controls the shape of the waveform by removing or "clipping" off an unwanted portion. A half-wave rectifier…
OTA in Sample and Hold Circuits: The OTA can be used in sample and hold circuits, as shown in Fig. 41.15. To sample and hold the input signal the control…