Voltage to Frequency Circuits

Voltage-to-frequency converter

The D169 serves as a level detector and provides complementary outputs. The op amp is used to integrate the input signal Vin with a time constant of R1C1. The input (must be negative) causes a positive ramp at the output of the integrator which is summed with a negative zener voltage. When the ramp is positive enough D169 outputs change state... .
Voltage-ratio-to-frequency-converter

The circuit accepts two positive-voltage inputs VN and Vv and provides a TTL-compatible output pulse train whose repetition mte is proportional to the ratio VN/ V0. Full-scale output frequency is about 100 Hz, and linearity error is below 0.5 percent. The outputF, equals KVn/Vd, where K = 1/(4R2C1) provided R1 = R3. Op amp IC1A alternately... .
Voltage-to-requency-converter

Circuit has a 1 Hz-to-30 MHz output, 150-dB dynamic range, for a 0 to 5 V input. It maintains 0.08% linearity over its entire 71/3 decade range with a full-scale drift of about 20 ppm/Â°C. To get the additional bandwidth, the fast )FET buffer drives the Schottky TTL Schmitt trigger. The Schottky diode prevents the Schmitt trigger from ever... .
Voltage-to-frequency-converter

The input voltage, V1, causes C1 to charge and produce a ramp voltage at the output of the 741 op amp. Diodes D1 and D2 are four-layer devices. When the voltage across C1 reaches the breakover voltage of either diode, the diode conducts to discharge C1 rapidly and the op amp output goes abruptly to zero. This rapid discharge action applies a... .
Voltage-to-frequency-converter

This circuit can accept positive or negative or differential control voltages. The output frequency is zero when the control voltage is zero. The 741 op amp forms a current source controlled by the voltage Ec to charge the timing capacitor C1linearly. NE555 is connected in the astable mode. so that the capacitor charges and discharges between... .
1Mhz-voltage-to-frequency-converter

This stabilized voltage-to-frequency converter features 1 Hz -1.25 MHz operation, 0.05% linearity, and a temperature coefficient of typically 20 ppm/Â°C. This circuit runs from a single 5-V supply. The converter uses a charge feedback scheme to allow the LTC1052 to close a loop around the entire circuit, instead of simply controlling the... .
Potentiometer-Position V/F Converter

In this application, an AD652IC is used in a synchronized V/F converter that derives its input from th .
Voltage-To-Frequency Converter I

Using a Burr-Brown VFC 32 IC, this voltage-to-frequency converter uses few components. The circuit values .
Voltage-To-Frequency Converter Ii

This voltage-to-frequency converter (VFC) accepts the bipolar-ac inputs. For -10- to + 10-V inputs, the c .
Simple Low-Frequency V/F Converter

In this circuit, CI is charged to a fixed reference level, then discharged. Integrator ICl circuit charg .
Precision voltage-to-frequency converter

In this circuit, integration is performed by using a conventional operational amplifier and feedback capacitor, CF. When the integrator's output crosses the nominal threshold level at pin 6 of the LM131, the timing cycle is initiated. The average current fed into the op amp's summing point (pin 2) is (1.1 RtCt) which is perfectly balanced with -... .
Low-cost-voltage-to-frequency-converter

The 741 op amp integrator signal is fed into the Schmitt trigger input of an inverter. When the signal reaches the magnitude of the positive-going threshold voltage, the output of the inverter is switched to zero. The inverter output controls the FET switch directly. For a gate voltage of zero, the FET channel turns on to low resistance... .
Wide-range-voltage-to-frequency-converter

This circuit is based upon the change of frequency of the function generator with the input voltage ViNÂ· Generally, the frequency depends upon the capacitance and resistor connected to pin 6. This resistor is replaced by the FET. .
Wide-range-voltage-to-frequency-converter

This circuit uses a programmable op amp such as the -HA2730-a two-amplifier monolithic chip with independent programming ports for each amplifier-whose slew rate and other parameters vary linearly with a so-called set current. The converter circuit uses one amplifier, Al, as a slewing amplifier and other, A2, as a comparator function. .
Self oscillating flyback converter

Diode Dl prevents negative spikes from occurring at the MOSFET gate, the 100 ohm resistor is a parasitic suppressor, and Z1 serves as a dissipative voltage regulator for the output and also clips the drain voltage to a level below the rated power FET breakdown voltage. .
100 Mhz converter

The 2N4416 JFET will provide noise figures of less than 3 dB and power gain of greater than 20 dB. The JFET's outstanding low crossmodulation and low intermodulation distortion provides an ideal characteristic for an input stage. The output feeds into an LM171 used as a balanced mixer. .
Bidirectional VF Control

Single-phase induction motors are extensively used in appliances and industrial controls. The Permanent Split Capacitor (PSC) single-phase induction motor is the simplest and most widely used motor of this type. The classification, construction and working principle of single-phase induction motors are explained in detail in the application note...
Inverters form three-phase VCO

The inspiration for the VCO in Figure 1 came from Texas Instruments application notes of years ago, detailing the use of unbuffered U-type inverters for use in ring oscillators. The application notes circuit consists of only the inverters. The circuit generates relatively squarish waveforms. Any ring oscillators operation depends on the... .
VCO produces output frequencies

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 implement in analog music-effects units, such as Bode/Moog frequency shifters. Bode/Moog shifters use...
Voltage Controlled Panner

This circuit is used to convert a mono audio signal into a stereo signal that can be panned between the left and right channel by a 0-10V control signal, it is intended for analog synthesizer systems. The circuit is mainly here for historical reasons, a higher quality panner may be built with the National Semiconductor LM13700 dual... .
programmable logic VCO

A VCO (voltage-controlled oscillator) is an analog circuit, so you cannot find it in the libraries for the design of digital programmable chips. When you need such a circuit for synchronization or clock multiplication, you need to find a circuit that works with the standard digital functions, such as AND and NAND. Several possibilities exist for...
PIC controlled DDS VFO

This is a 0 - 6 MHz DDS VFO controlled by a PIC16F84 (or `C84). The VFO is separated into two modules, the DDS module and the controller module. The PCB layout (double sided) for the DDS module is included as two Postscript files (scale 1:1). The .PS files can be copied to a Postscript capable printer such as HP LaserJet 4MP. Please note... .
Multilayer capacitor doubles as varactor

The circuit is also an inexpensive VCO (voltage-controlled oscillator) with only five components. Many types of ceramic capacitors for surface-mount placement are on the market. The parts become continually smaller because of space problems on the board, and the capacitance values continually increase to compete with more expensive... .
High Performance V to F converter

No Description available.
DPP adds versatility to VFC

The basic VFC (voltage-to-frequency converter) in Figure 1 comprises an integrator (IC1) and a Schmitt-trigger circuit (IC2). The integrator converts the dc input voltage, VIN, to a linear voltage ramp, and the Schmitt trigger sets the limits of the integrator`s output voltage. Feedback around both circuits provides the condition for... .
Simple DC to 20 MHz Driver

The output cable from my 20 MHz function/sweep generator dangled over the side of the workbench, the alligator clip hovering over the floor. Deeply engrossed in a project, I moved the power strip on the floor a little closer so I could plug in the circuit upon which I was working. That's when the alligator clip contacted the 240 VAC. The... .
voltage to frequency converter

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voltage frequency converter

A voltage to frequency converter with a control range of 1:1000 can be easily constructed by using the IC TSC9402. The given component values in the circuit produces a conversion factor of 1kHz/1V. The input voltages from 10 mV up to 10 V are converted to frequencies 10 Hz up to 10 kHz. This conversion can be changed if desired through the potenti .
voltage to frequency converter

This voltage to frequency converter is designed to be connected to a frequency counter to display the voltage value being measured. This converter-counter combination produces a cheap but functionally complete digital voltmeter. The circuit delivers TTL compatible pulses which are 5 µS wide. The pulse frequency is proportional to the DC voltage b .
Voltage to frequency converter

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voltage to frequency converter

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voltage to frequency converter icl8038

This was a small circuit made for driving an Impact counter. The heart being ICL8038. It must have been a Motor driving a Conveyor, the motor has a feedback attachment called Tachogenerator. Only part of the circuit is shown here. See the image of product here Tacho Counter. The configuration is derived from the Application Notes of Intersil. T .

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