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For the ring oscillator shown the propagation delay of each inverter is 125 pico sec. What is the fundamental frequency of oscillator output?
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- 10 MHz
- 100 MHz
- 1 GHz
- 2 GHz
- 10 MHz
Correct Option: D
Total propagation delay of the ring oscillator = 4 × 125 ns = 500 ps
Fundamental frequency,
| f = | = | = 2 GHz | ||
| tpd | 200 PS |
