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This programmable pulse generator provides multiple channels by utilizing stored program techniques in a plurality of parallelly-arranged random access memories.
English (United States)
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Multi-Channel, Programmable Pulse Generator
This programmable pulse generator provides multiple channels by utilizing
stored program techniques in a plurality of parallelly-arranged random access
In Fig. 1, a clock, which may have a variable frequency, determines the
minimum pulse increments and is connected to an address counter to determine
the pattern period which may be less than or equal to the limit set by the size of
the random-access memories. Information is stored in the random-access
memories so as to provide any desired pulse pattern at the channels 1, 2 and n
by producing at the output of the respective memories a series of pulses
consistent with the desired pulse length and passing these pulses through non
return to zero (NRZ) logic circuits coupled to the channels 1, 2 and n. The clock
is also connected to known control logic, such as chip select and read and write
circuits, which has an output connected to each of the memories.
Fig. 2 illustrates the pulse pattern produced in two typical channels, channel
1 and channel n. It can be seen that for one pattern period or cycle the pulses
produced by the memories are identified as K to K n and are then repeated for
the next similar period or cycle. The minimum pulse increment is identified as a
single random-access memory data bit 1 and may thus be greater than or equal
to that determined by the memory cycle time. To alter the pulse pattern for any
particular channel, appropriate new data is s...