introduction to integrated semiconductor circuits 1963 big by Unknown

Author:Unknown
Format: epub

100 INTEGRATED SEMICONDUCTOR CIRCUITS 4, PF832T—This is a group of high-speed, medium-current diodes. Two diodes have their cathodes tied together and two others are available separately. 5. PF860T—This group consists of one 100-ohm resistor, a 200-ohm resistor, and a 1200-ohm resistor tapped at 400/800 point. The tolerance is +15%. 6. PF861T—This group also contains three resistors, a 12, 24, and a 9 kilohm resistor tapped at 3 kilohm/6 kilohm point. These resistors also have a tolerance of +15%. 7. PF880T—This group contains three metal-oxide-silicon fixed capacitors, 100 pf, 50 pf, and 25 pf. 8. PF881T—This group contains two metal-oxide-silicon fixed capacitors, 200 pf each. REFERENCES 1. ‘‘High-Density Microelectronic Package Allows Do-it-yourself Circuit Design.” Electronic Equipment Engineering, September 1962, pp. 14-16. . Functional Components—M1 Matriz, brochure by General Electric. 3. Fairchild Semiconductor, 4 Components data sheets and brochure. 4. Master Slice Semiconductor Networks, brochure by Texas Instruments, Incorporated. : . Signetics vari EBS, Bulletin 1001, January 1963. 6. Signetics preF EBS, Bulletin 8001, January 1963. nw or A review of 9 digital logic circuits 9.1 PURPOSE OF THIS CHAPTER The limitations of the present state-of-the art in integrated circuits impose several constraints on the circuit designer. Unusually large tolerances on individual circuit components necessarily force the engineer into designing circuits which must operate on wide margins. Digital circuits, by their very nature, can be designed to be operable over wide margins; thus it is quite natural that the initial mass market for the integrated circuit would be in the digital computer field. In view of this vast potential, it is quite understandable that the vendors are concentrating their initial efforts in the field of digital logic circuits. (Digital logic circuits offered by the various vendors as their standard product lines are presented in the Appendixes.) The purpose of this chapter is twofold. For the engineer or the technician who is not intimately acquainted with the various forms of transistor-logic circuits, this chapter provides a brief introduction, which will, hopefully, enable him to appreciate the various types offered by the vendors today. For the reader who is well acquainted with the various transistor-logic circuits, it is hoped that this chapter will come in as a handy qualitative guide for occasional reference. No attempt is made to present detailed information on any circuit or family of circuits as far as circuit design procedures are concerned. Many excellent books and articles on the subject of logic-circuit designing are available, some of which are given as references at the end of this chapter, as well as in the bibliography. While an indefinite number of logic circuits is possible, this chapter covers only the classical logic circuits and some of the newer forms, which are principally an outgrowth of the integrated-circuit technology. 9.2 DIRECT-COUPLED TRANSISTOR LOGIC—DCTL Basic DCTL Concept Transistorized digital circuits basically fulfill the three logical functions of AND gating, OR gating, and signal inversion, An additional function usually performed, though not logical in nature but nevertheless a practical necessity, is signal amplification. Other 101

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