Basic Electronics Concepts and Circuits Explained

Inverting Amplifier using Opamp

Lakshmisree Gopal — Sat, 17 Dec 2016 04:55:11 +0000

Inverting amplifier is an amplfier whose amplfied output is negatively proportional to the input. Its gain will be negative. For eg. if we provide sine wave input, its amplified output will be 180° out of phase with input. When the input is voltage is increasing, output voltage will decrease and vice versa. Recommended Reading : […]

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Virtual Ground – Opamp

Ligo George — Fri, 02 Dec 2016 11:12:15 +0000

What is Virtual Ground ? As the name indicates it is virtual, not real ground. For some purposes we can consider it as equivalent to ground. In opamps the term virtual ground means that the voltage at that particular node is almost equal to ground voltage (0V). It is not physically connected to ground. This […]

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Opamp – Operational Amplifier

Lakshmisree Gopal — Sun, 21 Aug 2016 09:46:40 +0000

What is an Opamp ? Opamp is the abbreviation of Operational Amplifier. An operational amplifier is a direct coupled high gain amplifier usually consisting of one or more differential amplifiers followed by a level transistor and an output stage. The output stage is generally push-pull or complementary symmetry push-pull amplifier. Opamps are building blocks of analog […]

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Differential Amplifier using Transistors

Lakshmisree Gopal — Sun, 24 Jul 2016 17:20:40 +0000

As the name indicates Differential Amplifier is a dc-coupled amplifier that amplifies the difference between two input signals. It is the building block of analog integrated circuits and operational amplifiers (op-amp). One of the important feature of differential amplifier is that it tends to reject or nullify the part of input signals which is common to both inputs. […]

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Monostable Multivibrator using Transistors

Ligo George — Sun, 16 Aug 2015 14:33:13 +0000

Multivibrator is a non linear oscillator or function generator which can generate square, rectangular and pulse waves. Monostable Multivibrator or One-Shot Multivibrator has only one stable state. By default monostable multivibrator will be in its stable state, but when triggered it will switch to unstable state (quasi-stable state) for a time period determined by the RC time constant […]

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Compensated Attenuator

Ligo George — Sat, 09 Aug 2014 12:41:49 +0000

An attenuator is an electronic device which reduces the power or amplitude of a signal without considerably affecting the wave shape. Thus it works in an opposite way that of an amplifier does. Attenuator provides loss (gain < 1) while an amplifier provides gain (gain > 1). A Compensated Attenuator is a simple two port […]

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Zener Diode Voltage Regulator

Ligo George — Fri, 14 Dec 2012 16:56:34 +0000

Zener Diode is a general purpose diode, which behaves like a normal diode when forward biased. But when it is reverse biased above a certain voltage known as zener breakdown voltage or zener voltage or avalanche point or zener knee voltage the voltage remains constant for a wide range of current. Clarence Zener is the scientist […]

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Bridge Rectifier

vivekvs — Sat, 08 Dec 2012 17:33:34 +0000

Rectifier A rectifier is a device that converts AC into DC. The power available to us is in the form of AC. But almost all electrical equipments work on DC. So we need a converter that converts AC into DC. We employ a rectifier circuit for this purpose. Rectifiers are basically classified into Half Wave […]

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Astable Multivibrator using Transistors

Ligo George — Tue, 27 Nov 2012 06:01:14 +0000

An Astable Multivibrator or a Free Running Multivibrator is the multivibrator which has no stable states. Its output oscillates continuously between its two unstable states without the aid of external triggering. The time period of each states are determined by Resistor Capacitor ( RC ) time constant. Astable Multivibrator using Transistors – Circuit In the […]

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Transistor as a Switch

Ligo George — Mon, 26 Nov 2012 08:30:25 +0000

We all know that a transistor has 4 regions of operation, in which Active, Cutoff and Saturation are commonly used. A transistor works in active region when worked as an Amplifier. When a transistor works as a Switch it works in Cutoff and Saturation Regions. In the Cutoff State both Emitter Base Junction and Collector […]

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