Op-amp comparator circuit

op-amp comparator circuit is an open loop circuit. Because open loop op-amp have very high voltage gain. so small difference in input signals are detected. Here two signals which are to be compared are connected to the two input terminals. output will be either + Vcc or – Vcc. This op-amp camparator circuit is used …

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opamp – Introduction to Operational Amplifier

Operational amplifier has two inputs, Inverting (-ve) and non inverting (+ve) inputs and one output. 741 is one of the traditional op-amp, which have 8 pins. two pins are inputs, one pin is output and a Vcc (+ve) and Vee (-ve), which are supply voltages (range 5 to 15 V). It also have two offset …

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Thyristor or Silicon Controlled Rectifier (SCR)

Thyristor or Silicon Controlled Rectifier is well known as SCR. This device have four layers, three junctions and three terminals. Three terminals of SCR are gate, anode and cathode. Gate is located close to cathode. Like in PN junction diode, anode and cathode terminal makes thyristor or “silicon controlled rectifier” a RECTIFIER. Gate terminal controls …

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Bipolar Junction Transistor rrb je electronics

BJT or Bipolar junction transistor consist of three terminals. They are base, emitter and collector. It is used for amplification of weak signals and switching operations. It has two types of physical structures namely PNP and NPN. IN PNP, N type semiconductor is sand-witched between two P type semiconductors. In NPN, P type semiconductor is …

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PN Junction Diode for rrb je electronics

PN junction Diode is formed by joining P type semi conductor and n type semiconductors. Due to diffusion of electrons and holes from P region and N region a depletion layer is formed in between P type and N type semiconductors. This region consist of positive and negative ions. Where positive ions aligned on the …

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