VARIABLE GAIN AMPLIFIER AND OPTICAL SENSOR SYSTEM FOR A BILL VALIDATOR

VARIABLE GAIN AMPLIFIER AND OPTICAL SENSOR SYSTEM FOR A BILL VALIDATOR

An optical sensor system for use in a currency validator is described. The system includes a controller, a plurality of light transmitters, a plurality of light receivers and a variable gain amplifier circuit connected to the receivers and to the microcontroller. The microcontroller controls the gai...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: ZOLADZ, EDWARD, M., JR
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
CHECKING-DEVICES
CONTROL OF AMPLIFICATION
ELECTRICITY
HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING
PHYSICS
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:An optical sensor system for use in a currency validator is described. The system includes a controller, a plurality of light transmitters, a plurality of light receivers and a variable gain amplifier circuit connected to the receivers and to the microcontroller. The microcontroller controls the gain of the variable gain amplifier circuit. The variable gain amplifier circuit includes dual transconductance amplifiers connected together in such a manner to compensate for leakage current over a wide range of temperatures.