Feedback-controlled body-bias voltage source
First Claim
Patent Images
1. A system comprising:
- first circuitry operable for generating an output voltage;
second circuitry coupled to said first circuitry and operable for adjusting said output voltage in response to a control signal by providing a discharge path for said output voltage if enabled; and
an output monitor coupled to said first circuitry and operable for comparing said output voltage and a reference voltage and operable for generating said control signal based on a result of said comparing, wherein said control signal has a state that is proportional to an amount of difference between said output voltage and said reference voltage, wherein said output monitor is further operable for enabling said first circuitry in response to sensing an undervoltage condition, and wherein further an amount of voltage discharged via said second circuitry is configured to be proportionally controlled according to said state of said control signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A body-bias voltage source having an output monitor, charge pump, and shunt. a shunt circuit having on/off control is coupled to the output monitor and to the output of the charge pump. Upon sensing that the output voltage of the charge pump is above a desired value, the output monitor may disable the charge pump circuit and may enable the shunt circuit to reduce the voltage at the output of the charge pump. When the voltage output of the charge pump is below the desired value, the output monitor may disable the shunt circuit and may enable the charge pump circuit. A shunt circuit having proportional control may be substituted for the shunt circuit with on/off control.
-
Citations
21 Claims
-
1. A system comprising:
-
first circuitry operable for generating an output voltage; second circuitry coupled to said first circuitry and operable for adjusting said output voltage in response to a control signal by providing a discharge path for said output voltage if enabled; and an output monitor coupled to said first circuitry and operable for comparing said output voltage and a reference voltage and operable for generating said control signal based on a result of said comparing, wherein said control signal has a state that is proportional to an amount of difference between said output voltage and said reference voltage, wherein said output monitor is further operable for enabling said first circuitry in response to sensing an undervoltage condition, and wherein further an amount of voltage discharged via said second circuitry is configured to be proportionally controlled according to said state of said control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A device comprising:
-
a well disposed in a substrate; first circuitry operable for generating a body bias voltage for biasing said well; an output monitor coupled to said first circuitry and operable for comparing said body bias voltage and a reference voltage and operable for generating a control signal based on a result of said comparing, wherein said control signal is proportional to an amount of difference between said output voltage and said reference voltage; and second circuitry coupled to said first circuitry and operable for adjusting said body bias voltage in response to said control signal, wherein said output monitor is further operable for enabling said first circuitry in response to sensing an undervoltage condition, and wherein further an amount of voltage discharged via said second circuitry is configured to be proportionally controlled according to said state of said control signal. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A method comprising:
-
sensing a first voltage at an output monitor coupled to an integrated circuit; sensing a reference second voltage at said output monitor; generating a control signal based on a comparison of said first voltage and said second voltage, wherein said control signal has a state that is proportional to an amount of difference between said first voltage and said second voltage; and adjusting said first voltage in response to said control signal via a discharge path that shunts said first voltage if enabled; and enabling a source of said first voltage in response to sensing an undervoltage condition, and wherein further an amount of voltage discharged via said second circuitry is configured to be proportionally controlled according to said state of said control signal. - View Dependent Claims (17, 18, 19, 20, 21)
-
Specification