Multilayer Capacitor Doubles As Varactor -  03/20/03  EDN Design Idea   Correct voltage drop and phase shift in transmission lines - The main purpose for building the circuit in Figure 1 is to study the idiosyncrasies of X5R, Z5U, and Y5V multilayer ceramic capacitors. The circuit is also an inexpensiv. . .  [by Susanne Nell, Breitenfurt, Austria]

NE555 Timer Sparks Low-Cost Voltage-To-Frequency Converter -  02/21/08  EDN Design Idea   The combination of an NE555 timer and a Miller integrator yields a voltage-to-frequency converter that costs less than 50 cents. . .  [by Gyula Diószegi and János Nagy, Divelex Ltd, Budapest, Hungary]

Operation & Applications of the AD654 IC V-to-F Converter -  AN-278 Analog Devices App Note. . . 

Performs High-Speed Voltage-To-Current, Current-To-Current Conversion -  07/25/02  EDN Design Idea   The circuit in Figure 1performs active voltage-to-current conversion or acts as a variable-gain current mirror with high precision and bandwidth. A typical application is testing high-speed ICs or other devices that have inputs des. . .  [by Ali Mehmed, Nokia UK Ltd, Southwood, UK]

Perfrom high-speed voltage-to-current, current-to-current conversion -  07/25/02  EDN Design Idea   The circuit in Figure 1performs active voltage-to-current conversion or acts as a variable-gain current mirror with high precision and bandwidth. A typical application is testing high-speed ICs or other devices that have inputs des. . .  [by Ali Mehmed, Nokia UK Ltd, Southwood, UK]

Photo-Diode Current-To-Voltage Converters -  Application Note. . .  [National Semiconductor]

PIC controlled DDS VFO 0 to 6 MHz -  . . . 

Programmable Clock Oscillator -  voltage controller oscillator that was designed as a wide range oscillator to generate clock pulses for a stepper motor drive system, frequency could be varied over1, 000, 000:1. . .  [Richard Torrens]

Series-LC-Tank VCO Breaks Tuning-Range Records -  10/20/11  EDN Design Idea   A series tank circuit allows you a 4-to-1 frequency range. . . .  [by Louis Vlemincq, Belgacom, Evere, Belgium]

Simple VCO, 300 to 500 Mhz -  My Radio amateur callsign is OZ2CPU. I like to use Atmel AVR Atmega PIC16 PIC16F876 PIC16F84. Most electronics easy made for the novice and something is for the more experienced. . . .  [oz2cpu at gmail dot com]

Single transistor pump -  This is a simple circuit that can produce a staircase voltage output given a periodic pulse input. . . 

Ten Khz VFC uses Charge Pump Variation -  04/09/98 EDN Design Idea   (several circuits included, scroll the find this one) A diode-capacitor charge pump is the starting point for many voltage-to-frequency-converter (VFC] designs. The circuit in Figure 1 uses a variation on that classic theme to achi. . .  [by Stephen Woodward, University of North Carolina, Chapel Hill, NC]

Universal Watchdog Fully Controls µ Preset -  05/25/95 EDN Design Idea   Many µPs contain internal watchdog timers, and you may wonder why you need another stand-alone circuit. Unfortunately, more highly integrated functions have preset parameters that you may want to change. Also, internal watchdogs . . .  [by Terje Kvinge, Nera AS, Kokstad, Norway]

Using the AD650 Voltage-to-Frequency Converter as a Frequency-to-Voltage Converter -  AN-279 Analog Devices App Note. . . 

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