CONTROL OF INPUT BIAS CURRENT MODULATION IN AMPLIFIERS

CONTROL OF INPUT BIAS CURRENT MODULATION IN AMPLIFIERS

Examples of amplifiers use current-replication transistors and a separation circuit coupled to such transistors to separate error current components from other current components in a pre-driver of an amplifier. In response to driving the current-replication transistors with the separated error curr...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Archer, Tyler James, Damitio, Paul Gerard, Halbert, Joel Martin, Vasan, Bharath Karthik
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Beschreibung
Zusammenfassung:Examples of amplifiers use current-replication transistors and a separation circuit coupled to such transistors to separate error current components from other current components in a pre-driver of an amplifier. In response to driving the current-replication transistors with the separated error current components, replica base current components that approximate error-modulation components of the pre-driver base currents are generated. Replica-current subtraction circuitry coupled to the current-replication transistors then subtract the replica base current components from the pre-driver base currents, affecting cancellation of the error-modulation components of the pre-driver base currents.