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Microprocessor Circuits   Page 1
Microprocessors:  #'s     A-B     C-G     H-L     M-O     P     Q-S     T-Z

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+/-5V Power Supply Operation with TC7106A/7107A TC7106A/7107A -  Microchip Application Note Published 12-Nov-02  (App Note - added 2/06)
C Acts as Dedicated Motor-control -  09/11/98 EDN-Design Ideas....Motion-control systems often use a PWM signal to control the duty cycle for a motor driver or Amplifier module. Typical designs generate the PWM signals using..Please scroll to find this circuit. [Design Idea by [Dylan Horvath, Gecko Sysytems Inc, Austin, TX]
C Based Circuit Performs Frequency Multiplication -  27-May-99 EDN-Design Ideas....The traditional frequency multiplier requires many elements  a phase comparator to detect the phase error between the input and the output signals, a lowpass filter to convert the phase error....[Design Idea by Yongping Xia, Teldata Inc, Los Angeles, CA]
C controls charge pump as background task -  1-Aug-97 Issue of EDN  Because of power consumption and cost, designers of battery-powered devices mainly choose components that run at 3V or lower. Unfortunately, many devices operate only at 5V, including LCDs with built-in drivers, programming lines of many EEPROMs and flash chips, and CMOS ADCs....[Design Idea by Carlos Cossio, Santander, Spain]

C Controls Digital Potentiometer -  10/08/98 EDN-Design Ideas....Many digitally controlled potentiometers (for example, the LM1971/02/3 from National Semiconductor, www.national.com]incorporate a three-wire serial digital interface, using data, clock, and enable lines. In Figure 1, the potentiometer's nomenclature for these lines is Data-In....Several circuits in article, scroll to f ind this one.   [Design Idea by Lukasz Sliwczynski, University Of Mining And Metallurgy, Krakow, Poland]
C detects transmission rate of RS232 interface -  09/30/99 EDN-Design Ideas....RS-232 is the most common serial interface in the PC world. Most RS-232 interfaces communicate with the receiver at a fixed transmission rate, such as 9600 baud. But what happens if the transmitter operates with different transmission rates? Different transmission rates....[Design Idea by Thomas Schmidt, Microchip Technology, Chandler, AZ]
C forms FM oscillator -  10/28/99 EDN-Design Ideas....A project required an inexpensive oscillator whose frequency increased step by step from 200 to 400 Hz and then decreased to 200 Hz. The first step was to design a VCO with a staircase driver. However, this approach entailed at least four ICs and many discrete components. An....[Design Idea by Abel Raynus, Armatron International, Melrose, MA]
C generates a frequency burst -  02/03/00 EDN-Design Ideas....Pulse-sonar applications require generating bursts of a given frequency, duration, and repetition rate. Traditionally,  burst generator comprises a crystal oscillator with pulse modulation. But  easiest and cheapest way to generate  bursts is by using an inexpensive 8-bit C, such as  68HC705KJ1 and 68HC7051A (Motorola]....[Design Idea by Abel Raynus, Armatron International, Melrose, MA]
C implements Pushbutton Light Dimmers -  06/18/98 EDN-Design Ideas....A project required building a synchronous-demodulator circuit to track a line drawn on paper.  beauty of  synchronous-modulator/demodulator approach is its inherent noise rejection.  method rejects .File contains several circuits, scroll to find this one....[Design Idea by William Grill, Riverhead Systems, Littleton, CO]
C makes inexpensive sine-wave generator -  12/17/98 Issue of EDN  You can use A/D converters or external, controllable oscillators to generate sine waves from low-power, low-cost Cs. However, these methods add cost, reduce reliability, increase circuit and software complexity, increase power consumption, and increase overall size. Alternatively....Page includes several designs.  Scroll to find this one....[Design Idea by Jorge Luis B Romeu, IdeaWorks LTD, Syracuse, NY]
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