| 摘要 |
A circuit is described to detect and qualify a dibit signal, wherein the dibit signal includes a first peak amplitude followed by a second peak amplitude. The circuit includes a first qualification circuit that receives the signal and operates to detect and qualify the first peak amplitude of the dibit signal. The first qualification circuit also operates to assert an enable signal upon qualification of the first peak amplitude. A second qualification circuit is coupled to the first qualification circuit to receive the enable signal. The second qualification circuit operates to output an output signal representative of the dibit signal upon a second peak amplitude of the dibit signal only when the enable signal is asserted by the first qualification circuit.
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