Circuit configuration for an integratable and controllable ring oscillator
First Claim
1. Circuit configuration of an integratable and controllable ring oscillator for generating a clock signal, comprising:
- first and second stages being connected between supply terminals and having input and output terminals, said output terminal of said first stage being connected to said input terminal of said second stage, an inverter connected between said output terminal of said second stage and said input terminal of said first stage, and said input terminal of said second stage supplying a clock signal;
each of said stages including first and second transistors having load paths connected between said supply terminals in a series circuit with a connecting point between said transistors, said second transistor having a gate terminal connected to said input terminal, said first transistor determining the frequency of the clock signal, being controllable in accordance with a control variable and acting as a current source, a capacitor having one terminal connected to said connecting point and another terminal connected to a fixed potential, and a decoupling stage connected between said output terminal and said connecting point.
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Accused Products
Abstract
A circuit configuration of an integratable and controllable ring oscillator for generating a clock signal includes first and second stages being connected between supply terminals and having input and output terminals. The output terminal of the first stage is connected to the input terminal of the second stage. An inverter is connected between the output terminal of the second stage and the input terminal of the first stage. The input terminal of the second stage supplies a clock signal. Each of the stages includes first and second transistors having load paths connected between the supply terminals in a series circuit with a connecting point between the transistors. The second transistor has a gate terminal connected to the input terminal. The first transistor determines the frequency of the clock signal, is controllable in accordance with a control variable and acts as a current source. A capacitor has one terminal connected to the connecting point and another terminal connected to a fixed potential. A decoupling stage is connected between the output terminal and the connecting point.
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Citations
12 Claims
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1. Circuit configuration of an integratable and controllable ring oscillator for generating a clock signal, comprising:
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first and second stages being connected between supply terminals and having input and output terminals, said output terminal of said first stage being connected to said input terminal of said second stage, an inverter connected between said output terminal of said second stage and said input terminal of said first stage, and said input terminal of said second stage supplying a clock signal; each of said stages including first and second transistors having load paths connected between said supply terminals in a series circuit with a connecting point between said transistors, said second transistor having a gate terminal connected to said input terminal, said first transistor determining the frequency of the clock signal, being controllable in accordance with a control variable and acting as a current source, a capacitor having one terminal connected to said connecting point and another terminal connected to a fixed potential, and a decoupling stage connected between said output terminal and said connecting point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Circuit configuration of an integratable and controllable ring oscillator for generating a clock signal, comprising:
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first and second stages being interconnected between supply terminals, an inverter connected between said stages, and a terminal connected between said stages for supplying a clock signal; each of said stages including first and second transistors having load paths connected between said supply terminals in a series circuit with a connecting point between said transistors, a capacitor connected between said connecting point and a fixed potential, and a decoupling stage connected to said connecting point.
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Specification