|
VCO
from CMOS Schmitt Trigger IC - By changing the
supply voltage fed to a classic 4584 Schmitt trigger type oscillator, the oscillator frequency can be changed
over a range of 50:1. A 74HCU04 inverter is used at the output of the 4584 to maintain a constant TTL logic
level signal . . . [Hobby Circuit designed by David A. Johnson P.E., 03/12/02]
VCO Has Digitally Programmable Center Frequency - 04/25/96 EDN Design Idea The circuits in Figure 1 illustrates a narrowband VCO, which has
a digitally programmable center-frequency ratio of greater than 2-to-1. With a VCO having center-frequency
ratio (F HIGH/FLOW]of greater than 2-to-1, you can derive . . . [by Paul Sofianos, Motorola LICD, Chandler,
AZ]
VCO produces positive and negative output frequencies - 12/25/03 EDN Design Idea The circuit in Figure 1 is a quadrature-output VCO that
provides both positive and negative output frequencies, depending on the polarity of the control-voltage
input. The circuit provides a function that designers traditionally im. . . [by Henry Walmsley, Farnborough,
UK]
VCO supply touts
Low-Noise - 10/28/99 EDN-Design Idea Many portable
RF products use VCOs to generate the RF carrier frequency. These applications often require low-noise VCO
power-supply voltages that are higher than the primary battery voltage. Many designs use a DC/DC converter
powering a low-noise linear . . . [by Ted Henderson]
VCO using the TL431
reference - 10/10/13 EDN Design Idea The ubiquitous
TL431 voltage reference has found something else it’s good at. . . [by R O Ocaya]
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]
Versatile
Monolithic V/F or I/F Converter - Analog
Devices-Analog Dialogue. . . [by Gilbert, Barrie and Kress, Dave]
Versatile Monolithic V/Fs can Compute as Well
as Convert with High Accuracy - Application Note. . .
[National Semiconductor]
VFC makes
simple capacitance meter - 06/07/01 EDN Design Idea
When you develop the prototype of a circuit using capacitors or when you replace an old, defective capacitor
with a new one, you often need to know the value of the capacitor you use or replace. At times, the values
printed on th. . . [by K Suresh, Indira Gandhi Centre for Atomic Research, Kalpakkam, India]
Volt/F Converter Draws Flea Power - 04/24/97 EDN Design Idea The V/F converter in Figure 1 is unique because it draws less
than 30 µA from one unregulated supply while converting bipolar input voltages. It produces three
CMOS-compatible, 0to 10-kHz outputsone (F+]that becomes active when the input voltage is positive, another (F]that
takes. . . [by W Stephen Woodward, University of North Carolina, Chapel Hill, NC]
Voltage Controlled Switch
using 555 - In this circuit the 555 timer is used in a
novel way, as a voltage controlled switch. . . . [Circuit designed by Miroslav Adzic]
Voltage Controls Sine-Wave Frequency - 08/17/95 EDN Design Idea The circuit in Fig 1 generates a 50-Hz to 1-kHz sinusoidal
waveform that exhibits lower than 60-dB THD. The input voltage controls the output frequency with the
relationship 1 kHz/V. The output amplitude is invariant with frequen. . . [by Yongping Xia, EBT Inc,
Torrance, CA]
Voltage to
Frequency Converter + 1us LED Pulse Driver - This
circuit receives the signal from the above amplifier and launches powerful 1uS infrared light pulses from a
low cost LED that are frequency modulated by the audio information. The 10KHz center frequency of the pulse
stream is low enough so a standard . . . [Circuit by David Johnson P.E., 03/22/99]
Voltage
to Frequency Converter Circuit - This voltage to
frequency converter circuit has an oscillator that is voltage controlled and has a small, 0. 5% deviation.
IC1 function as a multivibrator and produces rectangular impulses with equal width. The width of the impulses
depend on R4, P1 and C1. With P1 we can do fine adjustments of the output frequency. The output. . .
[Circuit posted by Popescu Marian]
Voltage to Frequency Converter-40Khz - This circuit was designed to frequency modulate a 40KHz carrier, using human voice
frequencies. A common flip/flop is used at the core of the circuit . . . [Hobby Circuit designed by Dave
Johnson P.E., 12/12/04]
Voltage-Controlled Oscillator with Linear Frequency Output - TB3071 - Technology Inc. . . . [Microchip App Note last updated on 9-Nov-12]
Voltage-Controlled Resistor - A common request from
SPICE users is a voltage-controlled resistor. Although there's no SPICE component that directly models this
device, you can easily put one together. There's several ways to do it. You can even extend the device to
model more complex resistance functions like RTDs and thermistors (spice design) . . .
Voltage-To-Current Converter Makes A Flexible Current Reference - 09/18/03 EDN Design Idea The voltage-to-current converter in Figure 1 can both source
and sink current. The circuit isflexible than some traditional current references that require different
topologies for current sourcing and sinking. Also, you can easily adjust the value of the current reference
by simply adjusting the circuit's input voltage. . . [by Art Kay, Texas Instruments, Tucson, AZ]
Voltage-to-Frequency Converter Chip - Scroll to find
this circuit. . . [Analog Devices-Analog Dialogue by Klonowski, Paul]
Voltage-To-Frequency/Frequency-To-Voltage Converter - Application Note Published 12-Nov-02. . . [Microchip]
<<<< Previous
PAGE |
