| CPC G05F 3/262 (2013.01) [G05F 3/24 (2013.01); G05F 3/26 (2013.01); G05F 3/30 (2013.01)] | 16 Claims |
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1. A circuit, comprising:
a current generator coupled to a first voltage source and configured to:
generate a first current, and
mirror the first current as a second current and a third current;
a proportional to absolute temperature (“PTAT”) voltage generator coupled to the current generator and a second voltage source, the PTAT voltage generator configured to:
receive the second
current from the current generator, and
generate a third voltage based on the second current; and
a complementary to absolute temperature (“CTAT”) voltage generator coupled to the current generator and to the PTAT voltage generator, the CTAT voltage generator configured to:
receive the first current and the third current from the current generator, and
generate a reference voltage based on the first current, the second current, and the third voltage,
wherein:
the current generator includes a first field effect transistor (FET), a second FET, and a third FET, the first FET having a first gate, a first source, and a first drain, the second FET having a second gate, a second source and a second drain, and the third FET having a third gate, a third source, and a third drain;
the first FET configured to generate the first current;
the second FET and the third FET configured to mirror the first current as the second current and the third current, respectively;
the first source, the second source, and the third source coupled together and to the first voltage source;
the first gate, the second gate, and the third gate connected to one another and the first drain;
the second drain is connected to a FET in the PTAT voltage generator; and
the first drain and the third drain are connected to a transistor in the CTAT voltage generator.
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