Op-amp Comparator

An op-amp comparator compares two analogue input voltages, and switches its output between two fixed levels depending on which input is larger. The output Vout swings towards the positive supply rail if V1 is greater than V2, or towards the negative supply rail if V2...
Majority Detector Circuit

Majority Detector Circuit

A majority detector is a combinational logic circuit which gives a logic-1 output if a given number of inputs are simultaneously active. The following circuit gives a positive output when two or more inputs are enabled. Worked Example 1 Design a 4-input combinational...

Non-inverting Amplifier

A non-inverting amplifier produces an amplified signal which has the same polarity as the input signal using only an op-amp IC plus two external resistors The output voltage is determined by the external resistors and the input voltage according to the following...
Rules of Boolean Algebra

Rules of Boolean Algebra

A number of rules of Boolean algebra are available which may be used to simplify Boolean expressions by algebraic simplification. Basic Concepts Double Negation Commutative Law Associative Law Distributive Law Absorption Laws Idempotence Law Identity Law Annulment Law...

Operational Amplifiers

Basic Concepts Op-amp Assumptions Op-amp Terminology Basic Circuits Comparator Differential Amplifier Inverting Amplifier Non-inverting Amplifier Summing Amplifier Voltage Follower Oscillators Phase Shift Oscillator Relaxation Oscillator Wien Bridge Oscillator Active...

Diodes and LEDs

A diode is an electronic component which allows current flow in one direction only. Semiconductor Concepts Intrinsic & Extrinsic Semiconductors P-type and N-type Semiconductors PN Junction Diode Types Signal Diode LED Power Diode Zener Diode Schottky Diode Photo...