Ring oscillator
OwnerZachary Brantner, Maojing Lin +2inventors
InventorsZachary Brantner, Maojing Lin, Dinesh Somasekhar, Gopal Srinivasan
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Abstract
An apparatus comprises a first OR gate, a second OR gate, a first NAND gate, and a second NAND gate. The first OR gate comprises a first input terminal, a second input terminal, and an output terminal. The second OR gate comprises a first input terminal, a second input terminal, and an output terminal. The first NAND gate comprises a first input terminal coupled to the output terminal of the first OR gate. The first NAND gate also comprises a second input terminal coupled to the output terminal of the second OR gate. The second NAND gate comprises an output terminal coupled to the first input terminal of the second OR gate.
Claims20
An apparatus comprising:
- a first OR gate comprising a first input terminal, a second input terminal, and an output terminal;
- a second OR gate comprising a first input terminal, a second input terminal, and an output terminal;
- a first NAND gate comprising a first input terminal coupled to the output terminal of the first OR gate, and a second input terminal coupled to the output terminal of the second OR gate;
- and
- a second NAND gate comprising an output terminal coupled to the first input terminal of the second OR gate.
An apparatus comprising:
- a first ring oscillator (RO) stage comprising:
- a first AND gate comprising a first input terminal, a second input terminal, and an output terminal;
- a second AND gate comprising a first input terminal, a second input terminal, and an output terminal;
- and
- a first NOR gate comprising a first input terminal coupled to the output terminal of the first AND gate and a second input terminal coupled to the output terminal of the second AND gate;
- and
- a second RO stage comprising:
- a third AND gate comprising a first input terminal, a second input terminal, and an output terminal;
- a fourth AND gate comprising a first input terminal, a second input terminal, and an output terminal;
- and
- a second NOR gate comprising a first input terminal coupled to the output terminal of the third AND gate and a second input terminal coupled to the output terminal of the fourth AND gate.
A process of making a ring oscillator (RO) comprising:
- coupling input terminals of a first NOR gate to a first AND gate and a second AND gate to form a first RO stage;
- coupling input terminals of a second NOR gate to a third AND gate and a fourth AND gate to form a second RO stage;
- coupling a first input terminal of the first AND gate and a first input terminal of the second AND gate to a plurality of reset rails via a first NAND gate;
- and
- coupling a second input terminal of the third AND gate and a second input terminal of the fourth AND gate to the plurality of reset rails via a second NAND gate.
Dependencies are inferred from the claim text.