Circuit and system for programming a floating gate
View Patent ↗The invention provides circuits and systems for programming a floating gate. A floating gate tunneling device is used with an analog comparing device in a circuit having a floating reference node and an offset-mitigating feedback loop for iteratively programming a floating gate, or multiple floating gates.
1. A circuit for placing a selected charge on the floating gate of a tunneling device, comprising:
an analog comparing device having a first input operably coupled to the output of a tunneling device, the analog comparing device also having a second input selectably coupled to a reference signal;
a level shifting device selectably coupled to the input of the tunneling device, the voltage level shifting device also operably coupled to receive input from an analog comparing device output;
wherein the input of the tunneling device is selectably coupled to a reference node; and wherein,
a feedback loop selectably couples the analog comparing device output to the second analog comparing device input;
whereby a selected charge provided by the reference signal is placed on the floating gate of the tunneling device.
2. The circuit according to claim 1 further comprising one or more additional tunneling devices operably coupled to the analog comparing device whereby a selected charge provided by the reference signal is placed on the floating gates of the one or more additional tunneling devices.
3. The circuit according to claim 1 further comprising one or more additional power supplies operably coupled to the analog comparing device and tunneling devices.
4. The circuit according to claim 1 wherein the analog comparing device further comprises an op amp.
5. The circuit according to claim 1 wherein the analog comparing device further comprises a comparator.
6. The circuit according to claim 1 wherein the analog comparing device further comprises an analog to digital converter.
7. The circuit according to claim 1 wherein the tunneling device further comprises a Fowler-Nordheim tunneling device.
8. The circuit according to claim 1 wherein the tunneling device further comprises a Channel-Hot-Carrier tunneling device.
9. The circuit according to claim 1 further comprising electronic power system circuitry operably coupled with the floating gate.
10. The circuit according to claim 1 further comprising portable electronic system circuitry operably coupled with the floating gate.