Browse Prior Art Database

Control and Synchronizing Circuit

IP.com Disclosure Number: IPCOM000096193D
Original Publication Date: 1963-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Chin, PH: AUTHOR

Abstract

The circuit controls the turn on and turn off of saw tooth wave generator 10 and synchronizes its operation with power supply 11. Supply 11 feeds into load circuit 12, for instance an electrical motor, driven in response to the operation of generator 10. Generator 10 has a uni-junction transistor 13. This is normally in a high impedance state. It is switched to a low impedance state to supply a pulse to transformer 14 in response to the discharge of capacitor 15. Such pulse actuates firing circuit 16 which controls driving of load circuit 12.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Control and Synchronizing Circuit

The circuit controls the turn on and turn off of saw tooth wave generator 10 and synchronizes its operation with power supply 11. Supply 11 feeds into load circuit 12, for instance an electrical motor, driven in response to the operation of generator 10. Generator 10 has a uni-junction transistor 13. This is normally in a high impedance state. It is switched to a low impedance state to supply a pulse to transformer 14 in response to the discharge of capacitor 15. Such pulse actuates firing circuit 16 which controls driving of load circuit 12.

In turn on and turn off circuit 17, transistor 18 receives an input signal at terminal A. When the signal level is +V1, transistor 18 conducts to inhibit operation of generator 10. When the level at A is at ground GND, operation of generator 10 occurs normally. Circuit 17 also connects through coupling circuit 19 to A. C. power supply 11. The power supply signal is thus coupled to circuit 17 and a low voltage signal is developed by transformer 20 and applied across resistor 21. The waveform diagram shows, each time this voltage goes positive, transistor 18 conducts to inhibit operation of generator 10. This is by discharging capacitor 15, synchronizing generator 10 with power supply 11.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]