Coded data generation or conversion – Digital code to digital code converters – To or from particular bit symbol
Patent
1998-02-27
2000-01-11
Tokar, Michael
Coded data generation or conversion
Digital code to digital code converters
To or from particular bit symbol
375295, H03M 508
Patent
active
060140933
ABSTRACT:
A pulse coding system is disclosed that includes an encoder for encoding the received analog signal as a series of output pulses, and a decoder for receiving the pulses output from the encoder and for generating an output signal corresponding to the analog signal received by the encoder. The encoder includes a first decaying signal source for generating a decaying reference signal, and a pulse-generating comparator circuit for receiving the analog signal to be encoded as well as the decaying reference signal. The pulse-generating comparator circuit compares the amplitudes of the received analog signal and the reference signal and generates and outputs a pulse whenever the amplitude of the decaying reference signal falls below that of the received analog signal. The first decaying signal source receives the generated pulses and responds to the pulses by increasing the amplitude of the decaying reference signal a predetermined amount each time a pulse is received. The decoder includes a second decaying signal source for generating the output signal by increasing the amplitude of the output signal by a predetermined amount each time a pulse is received and subsequently allowing the amplitude to decay after each increase in amplitude.
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Jean Pierre Peguy
Tokar Michael
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