Class A amplifier Theory A Class A amplifier is the simplest and most fundamental type of power amplifier, widely recognized for its excellent linearity and low distortion. It has poor efficiency, as the device draws a constant current and dissipates significant power even without a signal. Despite these limitations, Class
A Class D amplifier, also called a switching amplifier, is a type of electronic amplifier where the active devices—typically MOSFET transistors—function as on/off switches rather than operating in their linear gain region as in conventional amplifiers.
Amplifier classes are categories that describe how an amplifier handles the combination of input signal amplification, linearity, power-efficiency and electromagnetic interference to at a given size and cost.
Supply voltage fluctuations, local charge storage, Power supply rejection, Switching noise suppression, High frequency stability of amplifiers and pure analog blocks, Effective series inductance
Any negative feedback system with significant gain would attempt to minimize the error at the input terminals. This means that the steady-state value of the difference between the two input terminals would be nearly zero. This similarity in two input pins in negative feedback circuits is called virtual short.
Op amp offset voltage, sources of offset in an amplifier, Way to reduce offset in an opamp, Trimming, Dynamic offset cancellation
Temperature independent reference, Startup circuit, PTAT, CTAT, Sub-1V bandgap circuit, CMOS compatible bandgap circuit.
IC 741 op amp is the most popular general-purpose operational amplifier in history. It can be found easily in the nearby radio shop. During its time, it was first opamp to solve the phase reversal problem.
Reference voltage, hysterisis, Debouncing, Window comparator, Opamp comparator, Schmitt trigger
Amplifier, comparator, super diode, voltage addition, voltage subtraction, voltage integration, voltage differentiator, voltage to current converter, peak detector, rectifier
A voltage differentiator is a circuit used in electronics to produce an output voltage that is proportional to the rate of change of the input voltage. In simple terms, it’s a circuit that measures how quickly the input voltage is changing over time.
Difference amplifier, Buffer input, Precision gain, Integrated resistor’s mismatch, Monolithic instrumentation amplifier
A voltage integrator, also known as an integrator circuit, is a type of analog electronic circuit that performs mathematical integration of an input voltage signal with respect to time. It essentially outputs a voltage proportional to the integral of the input voltage over a certain period of time.
A difference amplifier, also known as a differential amplifier, is a type of electronic amplifier that amplifies the difference between two input signals while rejecting any signals that are common to both inputs (common mode signals)
Inverting summing amplifier, Non-inverting summing amplifier, General summing amplifier equation, Audio mixer circuit, Signal processing, Analog to Digital converter
In a non-inverting opamp configuration, the output voltage is in the same phase as the input voltage. The input signal is connected to the non-inverting terminal of the opamp.
The inverting operational amplifier is a fixed-gain amplifier producing an opposite output polarity voltage for a given input voltage, as its gain is always negative.
A Schmitt trigger is a type of electronic circuit with hysteresis, primarily used to convert non-linear input signals into digital output signals. It helps in cleaning up noisy signals, squaring up waveforms, and providing a more stable output.
Non-idealities of operational amplifiers, Finite gain-bandwidth product, output impedance, input impedance, offset voltage/currents.
Op Amp is a short name for operational amplifiers. In electronics, it is used for operations like addition, subtraction, integration, differentiation, logarithms, gain, buffer (to amplify power), etc. That is how the name “operational” is justified.