Systems and methods for adjusting threshold voltage
View Patent ↗Systems and methods for adjusting threshold voltage. A threshold voltage of a transistor of an integrated circuit is measured. A bias voltage, which when applied to a body well of the transistor corrects a difference between the threshold voltage and a desired threshold voltage for the transistor, is determined. The bias, voltage is encoded into non-volatile storage on the integrated circuit. The non-volatile storage can be digital and/or analog.
1. An integrated circuit comprising:
non-volatile storage for storing a representation of a body bias voltage;
a body bias voltage distribution network for coupling said body bias voltage to a plurality of body biasing wells of said integrated circuit; and
wherein said body bias voltage distribution network comprises deep well structures.
2. The integrated circuit of claim 1 wherein said representation of a body bias voltage is stored in a digital format.
3. The integrated circuit of claim 1 wherein said representation of a body bias voltage is stored in an analog format.
4. The integrated circuit of claim 1 further comprising a body bias voltage source for generating said body bias voltage.
5. The integrated circuit of claim 4 wherein said representation of a body bias voltage in said non-volatile storage directly controls said voltage source.
6. The integrated circuit of claim 1 further comprising an electrical contact for coupling said body bias voltage from an external source.
7. The integrated circuit of claim 1 further comprising a microprocessor.
8. The integrated circuit of claim 1 wherein application of said body bias voltage to a transistor of said integrated circuit corrects a difference between a nominal threshold voltage and a desired threshold voltage of said transistor.
9. An integrated circuit comprising:
non-volatile storage for storing a representation of a body bias voltage;
a variable voltage source for generating said body bias voltage;
a body bias voltage distribution network for coupling said body bias voltage to a plurality of body biasing wells of said integrated circuit; and
a microprocessor for retrieving said representation of a body bias voltage and commanding said variable voltage source to generate said body bias voltage.
10. The integrated circuit of claim 9 wherein application of said body bias voltage to a transistor of said integrated circuit corrects a difference between a nominal threshold voltage and a desired threshold voltage of said transistor.
11. The integrated circuit of claim 10 wherein said transistor is a component of said microprocessor.
12. An integrated circuit comprising:
non-volatile storage for storing a representation of a body bias voltage;
a variable voltage source for generating said body bias voltage according to said representation;
a body bias voltage distribution network for coupling said body bias voltage to a plurality of body biasing wells of said integrated circuit; and
wherein said body biasing voltage is not applied to a substrate of said integrated circuit.