Multiple level voltage comparator circuit

Details Multiple level voltage comparator circuit Multiple level voltage comparator circuit

H - Electricity

03

K

324/68

H03K 5/24 (2006.01)

Patent

CA 1242247

MULTIPLE LEVEL VOLTAGE COMPARATOR CIRCUIT Abstract of the Disclosure A high speed voltage comparator circuit is disclosed which accepts a wide range of input potentials CBO1 and compares them with four potential levels CRH, CRL, CRIH, and CRIL. Each comparator includes input transistors Q103 and Q104, one of which is connected to the reference potential and the other is connected to the unknown potential. The emitters of the input transistors Q103 and Q104 are connected together through a resistor R105, and each emitter is connected to a current source, Q105 and Q107 respectively. A third current source Q106 is coupled to diodes D101 and D102 which are connected to the emitters of transistors Q103 and Q104 respectively. The difference between the reference potential and the unknown potential will forward bias one of the diodes and reverse bias the other. The resulting difference in emitter current between the input transistors Q103 and Q104 is detected by an output stage to indicate the relative magnitudes of the reference potential and the unknown potential.

452659

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