Pericom PCI-To-PCI Bridge Intel/TI/PLX Substitute:  Pericom Semiconductor Application Note # 081 (app note added 02/05)

Phase Modulated PWM Topology with the ML4818 / AN-42026:  Fairchild Application Notes / (app note added 6/06)

PI7C8150B Asynchronous Feature:  Pericom Semiconductor App Note # 07)1 (app note added 02/05)

PI7C8152B; Asynchronous Feature:  Pericom Semiconductor Application Brief # 045 (app note added 02/05)

PIC Micro to ISA Bus Interface:  (electronic circuit added 4/05)

PIC Project #1 RS-232 to I2C Interface:  (design circuit added 8/02)

PIC16CR ROM Code Submission:  Microchip Application Note Published 29-Nov-05   (app note added 2/06)

PIC16F84 Debugging Terminal:  (circuit added 7/02)

PIC16F84 Miniature Real Time Controller:  (circuit / schematic design added 6/06)

PIC16F84 Programmer #1:  (circuit / schematic design added 6/06)

PIC16F84 Serial I/O Expander with Picbasic:  (schematic / circuit design added 9/02)

Picmicro MCU as an IEEE 1451.2 Compatible Smart Transducer:  Microchip Application Note Published 26-Jul-00   (app note added 2/06)

Playing a Mac Through a Standard Telephone Line:  how to get sound from computer to Telephone line   (added 4/02)

PLD Code Reveals PC Board Revisions:  10/17/02 EDN Design Ideas  /  (added 1/05)  The PLD (programmable-logic-device) code in Listing 1 implements a pc-board-level revision-detection system that detects whether PLD pins are shorted together on a pc board. It is often advantageous to field a single PLD programming file that works for several generations of physical hardware. The PLD needs to understand what the board revision is, so that it can enable or disable functions, pi......

PLD Implements Fast Four Phase Clock Generator:  10/27/94 EDN Design Ideas /  (added 11/05)

PLD Replacement:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

PLD Solves RS 232C Compatibility Problem :  01/19/95 EDN-Design Ideas / (added 11/05)

PLDs Eliminate ISA PC Board's Jumpers:  06/23/94 EDN Design Ideas /  (added 2/06) 

PLDs Implement Delay Lines:  03/31/94 EDN Design Ideas /  (added 2/06)

PLDs Substitute for Obsolete Latches:  06/09/94 EDN Design Ideas /  (added 2/06) 

PLL Forms Simple MSK Demodulator :  12/17/98 EDN-Design Ideas  / (added 2/06)    In minimum-shift-keying (MSK) signaling, two frequencies that differ by the bit rate represent a one bit and a zero bit. Normally, the frequency shift occurs at the peak of a cycle, so that neither the amplitude nor the slope of the waveform shows a discontinuity. We needed to transmit 300-baud ASCIII text using ultrasonic transducers. These devices have a very narrow bandwidth around their 25-kHz resonant frequency, making MSK the obvious choice for modulation. A zero bit becomes 84 cycles of 25.2 kHz, and a one bit is 83 cycles of 24.9 kHz. It is easy to generate this signal with a PIC µC and an 8-bit DAC. However, a traditional MSK demodulator circuit uses a center-frequency VCO and several mixers and filters. This design needs something simpler: to wit, the circuit in Figure 1....

PLL IC Forms Simple Digital Phase Shifter:  01/04/96 EDN-Design Ideas / (added 2/06)

PLL Synchronizes Power-Supply IC :  07)/16/98 EDN-Design Ideas  / (added 2/06)

Port Interface:  (circuit added 7/02)

Power Factor Correction (PFC) Basics / AN-42047:  Fairchild Application Notes / (app note added 6/06)

Power Management for PIC18 USB Microcontrollers with Nanowatt Technology:  Microchip Application Note Published 19-Nov-04   (app note added 2/06)

Power over Ethernet Isolated Power Supply Delivers 11.5W at 90% Efficiency:  DN338  Design Notes (Linear Technology) (app note added 1/06)

Power Solutions for Flexible Motherboards (AN-6):  Application Note 6 from Microsem  (app note added 6/06)

Power Supplies for Subscriber Line Interface Circuits:  DN130  Design Notes (Linear Technology) (app note added 2/06)

Powerpc's On-Chip-Debug Features Alter Embedded Development :  11/07)/96 EDN-Design Feature  Although best known for high performance, the PowerPC family adds a new dimension to embedded-system development.—Jim Challenger, Software Development Systems

Practical Limits of RS485:  National Semiconductor Application Note 05 Oct1998 / (app note added 5/02)

Preprocessor for Rotary Encoder uses PAL:  08/02/01 EDN Design Ideas  /  (added 1/05)  Rotary encoders usually provide quadrature pulses that indicate both the amount of rotation and the direction (Figure 1). A microcontroller can calculate the rotation direction and keep track of angular movement. Many microcontrollers' interrupt inputs, such as those on the Zilog Z86C90, can detect only a falling edge....

Printed Circuit Board Drill:  Computerized PCB Mill (circuit added 8/06)

Printer Emulator Adapter:  (electronic schematic / circuit added 11/05)

Printer Port Activates CMOS Switches:  05/02/02 EDN Design Ideas  /  (added 1/05)  The cost-effective design in Figure 1 provides control for CMOS switches without the need for an external power supply. Analog switches such as those in the MAX4663 are ideal for use in low-distortion applications. They are preferable to electromechanical relays in automatic test equipment or other applications in which you need current switching....

PIC16F84 Miniature Real Time Controller:  (circuit / schematic design added 6/06)