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Volt Controlled Oscillator Circuits
Volt Controlled Oscillator Circuits
2 GHz CMOS Voltage-Controlled Oscillator with Optimal Design of Phase Noise and Power Dissipation
The oscillator is designed to tune from 1. 8 GHz to 2 GHz for typical cellular telephony applications. An extended tuning range can be obtained by adjusting the ratio between the varactor capacitance and fixed capacitance in the tank. PMOSFETs are employed in the design due to their low 1/f noise characteristics, critical for minimizing close-in ph
Voltage Controlled Oscillator
I wish to control a DC motor speed for a 6 volt brush motor through a linear pot and also have that speed oscillate (throb) with the oscillation frequency controlled by a linear pot to have a complete cycle peak to peak of around 1 to 5 seconds. you can see the sine wave controlling the pulse frequency. The pulse frequency can be controlled
Voltage Controlled Oscillator using NE555
A voltage-controlled oscillator using NE555 The circuit is usually known as a voltage-to-frequency converter as a result of the output frequency will be modified by changing the input voltage. As mentioned in previous blog posts, pin 5 terminal is voltage control terminal and its function is to manage the edge and trigger levels. Normally, the con
Voltage-controlled Current-limited switcher circuit
My product requires a voltage-controlled, current-limited power supply and for a number of years I have used various switcher chips with an op-amp to feed back a current sense voltage to the feedback pin. For the last couple of years I have been using an LM22680, but I seem to get variable results board to board. (Output voltage not consistent) I
Voltage-controlled cipher scheme of constant-current source of output high-power of bipolar
The output current range of the parameter current regulator is little, the current regulator is not tall in precision; It is small to connect the feedback adjustment type output current of the current stabilized power source in series, efficiency is lower; The steady stream source of the switch not only the circuit is complicated, the components...
Voltage Controlled Divide By N
LM359 Voltage Controlled Oscillator Circuit
Voltage controlled oscillator (VCO) is similar to a voltage to frequency converter (VFC), an oscillator which its output frequency is determined by a control voltage input. This is the figure of the circuit; Where d is the amplifier input voltage = 0. 6V, h=hysteresis of DM1474 (typically = 1V). R2 must beequal to 2R1 for proper operation. Using th
Op Amp And Two JFETs Form A Voltage-Controlled Amplifier
A simple linear voltage-controlled amplifier can be constructed with one op amp and two JFETs (see the figure). The amplifier can achieve an 80-dB dynamic control range with less than &#177;0.2% linearity error for 0 V .
Voltage-Controlled Current Source Uses Two Op Amps
Author Mazi Hosseini describes a simple, low-cost, voltage-controlled current source using two op amps that provides a good range of current and maximum load
a voltage-controlled current sink / voltage-controlled resistor
Control a current through several current-mirror device (specifically the IREF pin on the TLC5940 ) using a single potentiometer. I`ve tried using a modified Howland current souce as in the following schematic: While this works OK with resistor values as shown for dimming a LED, it doesn`t work as a current sink given a 1. 24V voltage source at...
4 channels mixer voltage controlled
The audio mixer schematic we propose is developed arround 4 amplifiers build inside SSM2024 produced by Precision Monolithics Inc. (PMI) and is voltage controlled (VR). The maximum VR voltage is 5. 5Volt. The signal/noise ratio is 90dB and 130Khz band wide. This 4 channels mixer works great at +- 15Volt but you can use voltages between 9Volt and 18
Voltage Controlled Oscillator
Voltage controlled oscillator is a type of oscillator where the frequency of the output oscillations can be varied by varying the amplitude of an input voltage signal. Voltage controlled oscillators are commonly used in frequency (FM), pulse (PM) modulators and phase locked loops (PLL). Another application of the voltage controlled oscillator is th
Inverse Voltage Controlled Voltage Source
This circuit allows a smaller control voltage to inversely linearly control a larger output voltage Vo. Another feature is that Vsp the supply to the op-amps can be lower than the output voltage so in theory this circuit could control a output voltage of any magnitude, since the op-amps use a different supply. This will work with single supply op-
Voltage Controlled Voltage Source
The disadvantage of the circuit above is that the supply of the op-amp is tied to the HV supply. Most op-amps are limited to around 30V on the supply, so the circuit wont work for higher output voltages. The circuit below avoids this this problem by inserting a n-channel mosfet, which can be fully controlled within the range of the op-amps power s
Voltage Controlled Switch using 555 Timer
In this circuit the 555 timer is used in a novel way, as a voltage controlled switch.The old and omnipresent NE555 can be very good at someth..
Voltage Controlled Audio Mixer Circuit
This audio mixer circuit schematic we propose here is built around four amplifiers, which are current controlled, all of them incorporated in IC SSM2024, p..
Voltage Controlled Current Source Phase Locked Loop
Phase Locked Loop Voltage Controlled Signal
ICL8038 Precision Waveform Generator/Voltage Controlled Oscillator
This circuit is a voltage-controlled oscillator, which is an oscillator whose frequency is determined by a control voltage. A 10 Hz sawtooth oscillator provides the control voltage in this case; this causes the frequency to rise slowly until it hits a maximum and then falls back to the starting frequency. The first op-amp is an integrator. A volta
Voltage Controlled Switch
This is a little circuit that i designed that could be used for achargingcontroller or voltage limiter. Its very useful if you are thinking of maki. In the assembly of the circuit u can alter the circuit as you please. For instance ididn`tgo as exact as theschematic. Just follow the diagram belo. In the circuit that i build thatsnottotally the same
Using a VCXO (Voltage-Controlled Crystal Oscillator) as a Clock (CLK) Generator
The term VCXO stands for Voltage Control Crystal Oscillator. The frequency of such an oscillator can be adjusted by a small amount through changing the control voltage. VCXO CLK generators have been used in various applications, such as digital T..
Voltage Controlled LFO
This is a nice LFO for all of your modulation needs. The frequency can be voltage controlled to add a new dimension to your sound palette. The pulse width of the rectangle wave can be varied between approximately 10% and 90% again lending variability to the modulation capabilities of this LFO. Voltage control can be used to vary the pulse width as
Voltage Controlled Oscillator 1V/Octave Tracking
Voltage Controlled PWM Generator
Circuits that generates PWM pulses. Most of them will translate a resistor value into duty cycle change. Although that is handy and easy, sometimes a voltage controlled PWM generator is needed. There are of course those micro-controllers that could make almost any kind of PWM signal translation, but i preferred to study and create a circuit...
Voltage-controlled dual slope operation square/triangular wave generator
10 Hz to 10 Khz Voltage Controlled Oscillator
Voltage-controlled oscillator (VCO) is an oscillator that its frequency is controlled using a voltage signal. The VCO described here provide both triangular and square wave output. The control voltage can be varied between 5 mV to 5 V, to produce oscillation frequency from 10 Hz to 10 KHz. Here is the schematic diagram of the circuit: This is a sc
Voltage-Controlled Tone/Volume/Balance Circuit
The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to..
Micropower VCO (Voltage-Controlled Oscillator)
This is a schematic diagram of a micropower voltage-controlled oscillator circuit. This circuit can generate square and triangle wave outputs and only need..
Varactor The Core of Voltage Controlled LC Tuner
In hybrid system, analog system with digital control, a voltage controlled things is very important since it can be interfaced by DAC from digital system. For..
Voltage Controlled Oscillator for Commercial FM Band
VCO (voltage controlled oscillator) is an electronic signal generator which produce a signal that has variable frequency depends on a voltage level at its..
Voltage Controlled Gain Video Amplifier
Gain adjustment will be more flexible if it controlled by a voltage signal, since we can use many methods to provide user interface. We can control it by a..
Astable Oscillator Circuits
Colpitts Oscillator Circuits
Crystal Oscillator Circuits
Hartley Oscillator Circuits
RF Oscillator Circuits
Sine Wave Oscillator Circuits
Square Wave Oscillator Circuits
Wein Bridge Oscillator Circuits
Pierce Oscillator Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity