Level regulator governed by a pilot tone

Limiting circuit with level limited feedback

Line driver with adaptive output impedance

Linear amplifier utilizing adaptive biasing

Linear high power transistor amplifier

Linear power amplifier feedback improvement

Linear transmitter training method and apparatus

Linear-phase filter having high gain selectivity

Logarithmic amplifier

Logarithmic lock-in amplifier

Logarithmically linearly controlled variable gain amplifier

Logic driver circuit with output protection

Loss less RF feedback for power amplifier linearization

Loudspeaker protection circuit

Loudspeaker protective system

Loudspeaker systems

Low coherence optical system having reflective means

Low current switched capacitor circuit

Low dissipation amplifier

Low distortion amplifier