Electronics 2 Flashcards

Vocabulary flashcards for Electronics 2, covering topics on amplifier frequency response, BJTs, JFETs, current mirrors, CMOS technology, and feedback.

Decibel (dB)

A unit used to express the ratio of two signal values, commonly used for gain or attenuation. Base of the logarithm is 10.

Attenuation

A reduction in signal strength, often expressed in negative decibels (dB).

Just Noticeable Difference (JND)

In audio systems, a difference of 3 dB in loudness is often considered a just noticeable difference.

Lower Critical Frequency

The frequency at which the gain of an amplifier starts to decrease due to the increased reactance of coupling and bypass capacitors.

Coupling Capacitor

A capacitor used to block DC signals while allowing AC signals to pass, affecting the lower cutoff frequency in amplifiers.

Bypass Capacitor

A capacitor used to short the source resistance at high frequencies, affecting the low-frequency response of amplifiers.

Internal Capacitances

Capacitances within a BJT that affect its high-frequency response.

Miller Effect

The phenomenon where the gate-drain capacitance (Cgd) in a JFET amplifier is amplified, reducing input impedance.

Cascode Amplifier

An amplifier configuration that reduces the Miller effect and improves high-frequency response.

Current Mirror

A circuit designed to copy a current through one active device to another, keeping the output current constant regardless of loading.

Compliance Voltage

The minimum voltage required for a current mirror to operate properly.

Darlington Pair

A configuration of two BJTs that provides exceptionally high current gain.

CMOS (Complementary Metal-Oxide-Semiconductor)

A technology used for constructing integrated circuits, known for low power consumption.

MOSFET

Metal-Oxide-Semiconductor Field-Effect Transistor; a type of transistor commonly used in CMOS circuits.

Negative Feedback

A technique used in circuits to improve stability, linearity, and frequency response.

Ideal Current Source

A theoretical current source with infinite internal resistance that delivers a constant current, regardless of the load.