Power up body bias circuits and methods
First Claim
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1. An integrated circuit (IC) device, comprising:
- at least a first body bias circuit that receives a first power supply voltage, the first body bias circuit configured to generate a first body bias voltage different from the first power supply voltages of the IC device;
at least a clamp control circuit that receives the first power supply voltage and generates a clamp signal when the clamp control circuit detects a saturation of the first power supply voltage;
at least a first bias control circuit that receives the first power supply voltage, the first body bias voltage and the clamp signal, the first bias control circuit configured to set a first body bias node to the first power supply voltage while the first power supply voltage is developing and until the first power supply voltage has completed developing, and to subsequently enable the first body bias node to be set to the first body bias voltage according to the clamp signal after the first power supply voltage reaches stable level and is saturated; and
a plurality of first transistors having bodies connected to the first body bias node.
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Abstract
An integrated circuit device can include at least a first body bias circuit configured to generate a first body bias voltage different from power supply voltages of the IC device; at least a first bias control circuit configured to set a first body bias node to a first power supply voltage, and subsequently enabling the first body bias node to be set to the first body bias voltage; and a plurality of first transistors having bodies connected to the first body bias node.
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Citations
19 Claims
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1. An integrated circuit (IC) device, comprising:
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at least a first body bias circuit that receives a first power supply voltage, the first body bias circuit configured to generate a first body bias voltage different from the first power supply voltages of the IC device; at least a clamp control circuit that receives the first power supply voltage and generates a clamp signal when the clamp control circuit detects a saturation of the first power supply voltage; at least a first bias control circuit that receives the first power supply voltage, the first body bias voltage and the clamp signal, the first bias control circuit configured to set a first body bias node to the first power supply voltage while the first power supply voltage is developing and until the first power supply voltage has completed developing, and to subsequently enable the first body bias node to be set to the first body bias voltage according to the clamp signal after the first power supply voltage reaches stable level and is saturated; and a plurality of first transistors having bodies connected to the first body bias node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18)
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9. A method, comprising:
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applying a first power supply voltage to an integrated circuit device; initially clamping at least a first body bias node to the first power supply voltage while the first power supply voltage is developing and until the first power supply voltage has completed developing; generating at least a first body bias voltage with the first power supply voltage; and subsequently allowing the first body bias node to be driven by the first body bias voltage after detecting a saturation of the first power supply voltage;
whereinthe first body bias node provides the first body bias voltage to bodies of a plurality of first transistors. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An integrated circuit (IC) device, comprising:
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a first power supply connection configured to receive a first power supply voltage; a second power supply connection configured to receive a body bias voltage based on a second power supply voltage greater than the first power supply voltage; at least a first body bias generator circuit coupled to receive power at a generator power supply node and configured to generate a first body bias voltage; a switch circuit configured to couple the second power supply connection to the generator power supply node while the first power supply voltage is developing and until the first power supply voltage has completed developing, and to subsequently couple the first power supply connection to the generator power supply node after detecting a saturation of the first power supply voltage; and a plurality of first transistors having bodies coupled to receive the first body bias voltage. - View Dependent Claims (17, 19)
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16. The IC device of 15, further including:
a voltage regulator configured to receive the second power supply voltage and regulate the second power supply voltage to achieve the body bias voltage.
Specification