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Browse Prior Art Database

Incremental Voltage Height Generator

IP.com Disclosure Number: IPCOM000093157D
Original Publication Date: 1967-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 3 page(s) / 44K

Publishing Venue

IBM

Related People

Bolt, MH: AUTHOR [+3]

Abstract

This voltage height generator VHG generates thirty-two discrete voltage steps in a unique manner. Each step is present for a fixed period, for example, 480 microseconds. VHG includes main transmission line 2, connected to five directional couplers d1...d5. Line 2 is driven from logic block 3 and feeds into logic block 4. Information is placed on line 2 by d1...d5.

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Incremental Voltage Height Generator

This voltage height generator VHG generates thirty-two discrete voltage steps in a unique manner. Each step is present for a fixed period, for example, 480 microseconds. VHG includes main transmission line 2, connected to five directional couplers d1...d5. Line 2 is driven from logic block 3 and feeds into logic block 4. Information is placed on line 2 by d1...d5.

Each coupler has a unique reIationship to the others with respect to coupler length and spacing. Coupler d1 is a two ns, nanosecond, coupler which produces a four ns pulse on line 2, when energized. Coupler d2 is a four ns coupler spaced four ns in time away from d1. Coupler d2 produces an eight ns pulse. Coupler d3 is an eight ns coupler speaced eight ns from coupler d2. Coupler 4 is a sixteen ns coupler spaced sixteen ns from coupler d3. Coupler d5 is a thirty-two ns coupler spaced thirty-two ns from coupler d4.

When a coupler is energized, a pulse is produced in line 2 which travels to logic block 4. When block 4 is gated, such pulse is inverted and fed to logic block 3 by Iine 5. Block 3 inverts the pulse and applies it to line 2. The pulse continues to circulate around this loop until gate line 6 is raised to a degate level. While a pulse is circulating, a waveform is produced on output line 7 of block 4. The waveform has a period of one hundred twenty-eight ns. The effect of energizing any particular coupler or combination of couplers is that the pulse, or pulses, produced on line 2 causes the waveform on line 7 to have a predetermined ratio of uptime to downtime, dependent upon the particular energized coupler. Thus, by energizing all combinations of d1...d5 at different times, thirty-two waveforms are produced, each having a different ratio of uptime to downtime.

Line 7 feeds the output waveform from block 4 to integrator 8. The latter acts as a low-pass filter for shunting out the AC component to ground and passing the average DC v...