Temperature dependent regulation of threshold voltage

A circuit comprising:

• a node;
• a first transistor comprising a body terminal, the first transistor to provide a current ION when ON;
• a first current mirror coupled to the first transistor to source to the node a first current proportional to ION;
• a second transistor comprising a body terminal, the second transistor to provide a current IOFF when OFF;
• a second current mirror coupled to the first transistor to sink from the node a second current proportional to IOFF, and
• an amplifier coupled to the node and to provide a bias voltage to the body terminals of the first and second transistors so that under steady state the first and second currents are equal to each other.

A circuit comprising:

• a node;
• a first transistor comprising a body terminal, the first transistor to provide a current ION when ON;
• a first current mirror coupled to the first transistor to sink from the node a first current proportional to ION;
• a second transistor comprising a body terminal, the second transistor to provide a current IOFF when OFF;
• a second current mirror coupled to the second transistor to source to the node a second current proportional to IOFF, and
• an amplifier coupled to the node and to provide a bias voltage to the body terminals of the first and second transistors so that under steady state the first and second currents are equal to each other.

A circuit comprising:

• a node;
• a first transistor comprising a body terminal, and having a current ION when ON;
• a first current mirror connected to the first transistor to mirror ION with a first gain to the node;
• a second transistor comprising a body terminal, and having a current IOFF when OFF;
• a second current mirror connected to the second transistor to mirror IOFF with a second gain from the node;
• and
• an amplifier comprising an input port connected to the node and comprising an output port connected to the body terminals of the first and second transistors.

A circuit comprising:

• a node;
• a first transistor comprising a body terminal, and having a current ION when ON;
• a first current mirror connected to the first transistor to mirror ION with a first gain from the node;
• a second transistor comprising a body terminal, and having a current IOFF when OFF;
• a second current mirror connected to the second transistor to mirror IOFF with a second gain to the node;
• and
• an amplifier comprising an input port connected to the node and comprising an output port connected to the body terminals of the first and second transistors.

A system comprising a die and a cache not on the die, the die comprising:

• a first transistor having a current ION when ON;
• a second transistor having a current IOFF when OFF;
• and
• a circuit to body bias the first and second transistors so that when the first and second transistors are at thermal equilibrium with a temperature, the ratio of ION to IOFF is independent of temperature for a range of temperature values.