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An encoder converts a binary data word to a binary code word. The encoded bits have first and second binary values at a predetermined clock interval. A pulse generator responds to the encoded bits to generate energizing pulses during each clock interval in which the encoded bits have the first binar

An encoder converts a binary data word to a binary code word. The encoded bits have first and second binary values at a predetermined clock interval. A pulse generator responds to the encoded bits to generate energizing pulses during each clock interval in which the encoded bits have the first binary value. The energizing pules have a uniform duration less than the clock interval. A laser responds to the energizing pulses for recording on a medium.

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1. An apparatus comprising:an encoder for converting a binary data word to a binary code word in which encoded bits have first and second binary values at a predefined clock interval;a pulse generator responsive to the encoded bits so that energizing pulses having a uniform duration less than the cl

1. An apparatus comprising:an encoder for converting a binary data word to a binary code word in which encoded bits have first and second binary values at a predefined clock interval;a pulse generator responsive to the encoded bits so that energizing pulses having a uniform duration less than the clock interval are generated during each clock interval in which the encoded bits have the first binary value; and a laser responsive to the energizing pulses for recording on a medium.