Analogue signal processing key terms

resonant frequency

The frequency at which an LC circuit naturally oscillates due to the inductance and capacitance present.

LC circuit

An electrical circuit consisting of an inductor (L) and a capacitor (C) connected together, which can store and transfer energy.

resonant frequency

The frequency at which an LC circuit naturally oscillates, determined by the inductance (L) and capacitance (C) of the circuit.

LC circuit

An electrical circuit consisting of an inductor (L) and a capacitor (C) connected together, used to filter specific frequencies.

frequency response curve

A graphical representation showing how the output of a system varies with frequency, indicating the system's behavior at different frequencies.

resonant frequency

The frequency at which a system exhibits maximum amplitude of oscillation due to resonance, determined by the system's inductance and capacitance.

resonance

The phenomenon that occurs when a system is driven at its natural frequency, resulting in maximum amplitude of oscillation.

filtering

The process of allowing certain frequencies to pass through while attenuating others in a signal processing circuit.

ideal operational amplifier

An ideal op-amp is a theoretical amplifier with infinite open-loop gain, infinite input impedance, and zero output impedance.

negative feedback

Negative feedback is a process where a portion of the output signal is fed back to the input to stabilize and control the gain of the amplifier.

open-loop gain

The amplification factor of an operational amplifier when no feedback is applied, indicating how much the output voltage will change in response to a change in input voltage.

saturation

The condition in which an operational amplifier's output voltage reaches its maximum or minimum limit, preventing further increase or decrease despite changes in input.

negative feedback

A process in which a portion of the output signal is fed back to the input to reduce the overall gain and stabilize the system.

open-loop gain

The gain of an operational amplifier when no feedback is applied, representing the maximum amplification of the input signal.

virtual earth

A concept in operational amplifier circuits where the inverting input is maintained at a constant voltage, effectively treated as zero volts due to high open-loop gain.

open-loop gain

The gain of an operational amplifier when no feedback is applied, indicating how much the amplifier will amplify the input signal without any external influence.