Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Patent
1990-12-28
1996-06-11
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
341155, H03M 112
Patent
active
055259855
ABSTRACT:
A hybrid monolithic IC that is standardized for controlling various types of electrical equipment, such as circuit breakers, motor controllers and the like. The IC is a hybrid monolithic IC, fabricated in CMOS technology. The shortcomings of utilizing CMOS technology for linear or analog circuitry is overcome by the implementation of the IC to provide a hybrid monolithic IC that is relatively less expensive than using multiple IC's or a single IC fabricated from biCMOS technology. Also, by utilizing a single IC, such control and monitoring circuitry can be located in existing electrical equipment. The IC includes an on-board microprocessor, an A/D subsystem and various input/output devices which make it adaptable for use in various types of electrical equipment. In order to improve the resolution of the A/D subsystem, circuitry is provided, which includes current and voltage ranging amplifiers for ranging analog input voltage and current signals and compensating internal offsets, in such amplifiers, inherent in CMOS linear circuits which can affect the accuracy of the least significant bit. The ranging circuitry is controlled either automatically or manually to provide additional resolution of the A/D subsystem.
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Elms Robert T.
Schlotterer John C.
Eaton Corporation
Moran Martin J.
Young Brian K.
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