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A reference voltage source comprises a bridge circuit having two avalanche (zener) diodes 1 and 2 connected in its opposite arms and two resistors 3 and 4 connected in the other arms, two operational amplifiers 5 and 6, an a.c.- d.c. voltage converter 17 having an input connected to an output termin...

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Bibliographische Detailangaben
Hauptverfasser:	PUNGAS,TOOM A.,SU, PARVE,TOOMAS E.,SU, MIN,MART V.,SU
Format:	Patent
Sprache:	ger
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY CONTROLLING ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER PHYSICS PULSE TECHNIQUE REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Beschreibung
Zusammenfassung:	A reference voltage source comprises a bridge circuit having two avalanche (zener) diodes 1 and 2 connected in its opposite arms and two resistors 3 and 4 connected in the other arms, two operational amplifiers 5 and 6, an a.c.- d.c. voltage converter 17 having an input connected to an output terminal 16 of the source, a d.c. reference voltage setting circuit 18 and a comparator 19 having inputs connected to the converter 17 and to the setting circuit 18. The comparator 19 has an output connected to a non-inverting input 10 (or 21) of the operational amplifiers 5 (or 6). The output of the operational amplifiers 5 and 6 are connected alternately to the output terminal 16 while the inverting inputs are each connected to a respective electrode of a respective one of the avalanche diodes 1 and 2. The reference source provides an amplitude regulated ac square wave, or by using a circuit 60 with a time varying voltage gain, an approximate sinusoid.