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Circuit With Asynchronous Control And Synchronous Integrated Output

IP.com Disclosure Number: IPCOM000098475D
Original Publication Date: 1960-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Stafford, TS: AUTHOR

Abstract

A NOR logic circuit, left drawing, with + AND blocks A-1 and A-2 and -OR blocks 01 and 02, responds to an asynchronous A pulse at terminal 1 and periodic B pulses at terminal 2 to supply a synchronous output pulse C at terminal 3. The C pulse duration is broadly controlled by the length of the A pulse, but specifically corresponds in duration either to the basic B pulse period or an integral number of B pulse periods. The relationship of the various pulses in a typical sequence is shown in the right drawing.

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Circuit With Asynchronous Control And Synchronous Integrated Output

A NOR logic circuit, left drawing, with + AND blocks A-1 and A-2 and -OR blocks 01 and 02, responds to an asynchronous A pulse at terminal 1 and periodic B pulses at terminal 2 to supply a synchronous output pulse C at terminal 3. The C pulse duration is broadly controlled by the length of the A pulse, but specifically corresponds in duration either to the basic B pulse period or an integral number of B pulse periods. The relationship of the various pulses in a typical sequence is shown in the right drawing.

The + AND blocks provide a negative output when both inputs are positive. The -OR blocks provide a positive output when any input is negative. The 0-1 and 0-2 blocks, together with latching interconnections, form a trigger. Initially A- 1 and A-2 outputs are positive, 0-1 output is negative, and 0-2 output is positive.

The A pulse input to A-1 on line 4is assumed to rise at time T-0. No circuit reaction occurs at this time. At time T-1, a first B pulse arrives on line 5 to A-1 and also on line 6 to A-2. The output of A-1 on line 7 to 0-1 and on line 8 to A-2 becomes negative. A-2 continues to present a positive output to 0-2 on line 9. The negative output from A-1 to 0-1 results in a positive output from O-1, which represents the beginning of the C pulse at terminal 3. The C output from 0-1 is also directed to 0-2 on line 10 to establish a latching action between 0-2 and 0-1 on line 11.

When...