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Explain clock generation techniques.

Subject: Basic VLSI Design

Topic: VLSI Clocking and System Design

Difficulty: Medium

1 Answer
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Clock generation

  • Clock signal are the heartbeats of digital systems. A simple technique used for on-chip generation of a primary clock signal would be using a ring oscillator.

  • The simple inverter based cascade produces complementary clocks Φ and ϕ ̅ from the signal input clock signal.

  • The figure below shows a simple RS-FF clock generator that generates clk1 and clk2 from original clock signals.

  • In order to improve the driving ability of clock generator, they are buffered. The figure below shows buffered clock generator. This would increase the time between the rising edges.

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