Differential dual floating gate circuit and method for programming
A floating gate and circuit technology, applied in electrical analog memory, instrument, static memory, etc., can solve the problem of fast trapping of tunnel oxide
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[0043] image 3 is a circuit diagram of a differential single floating gate circuit 30 for accurately setting a floating gate to an analog voltage during a high voltage set mode or set period in accordance with the present invention. Figure 4A is a circuit diagram of a differential double floating gate circuit 40 according to another embodiment of the present invention. Circuit 40 is also used to accurately set the floating gate to an analog voltage during the high voltage set mode. Once the analog voltage level is set, both circuit 30 and circuit 40 can be configured as a precision voltage comparator circuit with an embedded voltage reference or as a precision voltage reference circuit during a read mode. Circuits 30 and 40 are preferably implemented as integrated circuits fabricated using standard CMOS processing techniques. Since the sequence used during the setup mode is similar for both circuits, circuit 30 and the method of programming the floating gate with circuit 30...
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