Browse Prior Art Database

Strobe Signal Generator

IP.com Disclosure Number: IPCOM000088409D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Warren, RK: AUTHOR

Abstract

This arrangement utilizes shift registers and a multiplexer to generate appropriate strobe signals to provide stroboscopic viewing of repetitive events.

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Strobe Signal Generator

This arrangement utilizes shift registers and a multiplexer to generate appropriate strobe signals to provide stroboscopic viewing of repetitive events.

A clock 3 generates basic clock pulses at a predetermined rate, for example, 4 MHz. These clock pulses are supplied to serial frequency dividers 5 and 7 where they are divided down by a factor of 40. The resultant 100 KHz pulses are supplied through inverter 9 and line driver 11 to a terminal 13, from which they are supplied to the device generating the repetitive events, such as the generation of a stream of ink droplets in an ink jet printer.

The clock pulses are also supplied to the clock input of shift register 15. Outputs from shift register 15 are supplied to one set of inputs of a multiplexer 17 having a 16-position portion and a 4-position portion.

A flip-flop 19 is turned on or off by operation of a switch, not shown, which determines whether the strobe is enabled or not. The output of 19 is supplied to an input of AND circuit 23, along with the output of an adjustable timer 21, set to provide variable rate output pulses as selected by the operator for variable viewing speeds. The output of AND 23 is supplied to the multiplexer 17, and is divided by 20 by the dividers 25 and 27, the outputs of 27 being supplied to multiplexer 17, and also, via inverter 29, to the flip-flop 31.

The outputs of the two sections of the multiplexer 17 are combined in AND circuit 33, and the output sign...