Delco Electronics Corporation

Delco Electronics Corporaiton

Delco Electronics Corpooration

Robert Harrison Reed

Dennis Michael Koglin

Mark Billings Kearney

A multiplier and corresponding method are provided for amplifying a voltage difference between a first input voltage and a second input voltage, the multiplier being implemented with Bipolar Junction Transistor technology having high emitter resistance. The multiplier includes a first bipolar input transistor having high emitter resistance that receives the first input voltage and a second bipolar input transistor having high emitter resistance that receives the second input voltage. The multiplier also includes a first current source for generating a first current that flows through said first bipolar input transistor, a current mirror for producing a second current that is substantially equal to said first current and flows through said second bipolar input transistor. A range select impedance forms a first voltage loop with said first bipolar input transistor and said second bipolar input transistor and translates the voltage difference between the first input voltage and the second input voltage into a differential current. The differential current varies said second current and alters a base-to-emitter voltage of said second bipolar input transistor. A second voltage loop is provided that includes said second bipolar input transistor, the second voltage loop providing a relationship between said base-to-emitter voltage of said second bipolar input transistor and a multiplier current that represents the difference between the first input voltage and the second input voltage.

Integrated differential voltage amplifier with programmable gain and

A supply and temperature dependent linear signal generating circuit includes four transistors each having a unique current flowing therethrough and connected together to form a current multiplier. A first one of the currents is designed to be supply dependent and preferably adjustable in magnitude, a second one is designed to exhibit a specific temperature dependence, the third is designed to be both supply and temperature independent and the fourth current is defined as a ratio of the first three. The fourth current is, in one embodiment, impressed upon a network defined by a resistor divider and a voltage source to thereby define an output voltage V(T) that is both supply and temperature dependent according to the following equation:

Supply and temperature dependent linear signal generator

A memory cell having programming voltage margin verification is provided. The memory cell includes a voltage comparator having a differential input with first and second inputs and bias circuitry for generating a differential input voltage. A voltage offset is applied to the second input of the comparator to provide an input offset voltage. A programming voltage is received for programming the memory cell and the memory cell provides an output signal. To verify an unprogrammed state voltage margin of the memory cell, a margin detection circuitry receives a verification check signal and the output is monitored to determine whether the unprogrammed state voltage margin is proper. To verify a proper programmed state voltage margin of the memory cell, current is sensed through the programming input and a determination of a proper programmed state voltage margin is determined as a function of the sensed current.

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Kokomo, IN, United States of America

Robert Harrison Reed