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Oscillations and Regenerative Amplification using Negative Resistance – Circuit Schematic
Oscillations and Regenerative Amplification using Negative Resistance
The usual procedure for the production of sustained oscillations in tuned L-C networks is to overcome circuit losses through the use of designed-in positive fee...
A Low-Frequency Crystal Controlled Oscillator – Circuit Schematic
A Low-Frequency Crystal Controlled Oscillator
The RF engineer sometimes has to look for an instrument that will check a low frequency quartz crystal unit reliably and rapidly. This is a difficult piece of e...
741 Astable Timer – Circuit Schematic
741 Astable Timer
In this circuit a standard op-amp is wired as an astable multivibrator. The output is non-symmetrical but has the advantage that the timing is controlled by onl...
Function Generator – Circuit Schematic
Function Generator
Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle waves from 20Hz to 200kHz in four switched ranges. There are bo...
Two Simple Crystal Test Circuits – Circuit Schematic
Two Simple Crystal Test Circuits
In the first circuit, above the BC548 is wired as a colpitts oscillator, the frequency tuned by insertion of a crystal. A good crystal will create high frequenc...
Electronic Canary – Circuit Schematic
Electronic Canary
This circuit is a modified hartley oscillator with a couple of extra components included. The transformer is a small audio transformer, type LT700. The primary ...
Resonant Frequency of a Colpitts Oscillator – Circuit Schematic
Resonant Frequency of a Colpitts Oscillator
This result puts the oscillator in the middle of the UK FM Band (87. 5 - 108 MHz). If L1 has an adjustable ferrite core then its inductance can be altered and f...
Crystal Oscillator Circuits – Circuit Schematic
Crystal Oscillator Circuits
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CTI Oscillator – Circuit Schematic
CTI Oscillator
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Clock Oscillator BasicCircuit from Sirius microSystem – Circuit Schematic
Clock Oscillator BasicCircuit from Sirius microSystem
The following file contains detail info about design of Clock Oscillator Basic Circuit Diagram. Included in this file information about: selecting the.....
COLPITTS 1 To 20 MHz Crystal Oscillator – Circuit Schematic
COLPITTS 1 To 20 MHz Crystal Oscillator
Colpitts 1MHz To 20 MHz Crystal Oscillator Circuit This is a simple Colpitts crystal oscillator for 1 to 20 MHz, PARTS LISTR1220k?R21k?C182pFC20.001µFC3100pFC4...
Switchable Output Crystal Oscillator – Circuit Schematic
Switchable Output Crystal Oscillator
Switchable Output Crystal Oscillator Circuit This oscillator circuit permits crystals to be electronically switched by logic commands. The circuit is best under...
Adjustable Sine/Square Wave Oscillator – Circuit Schematic
Adjustable Sine/Square Wave Oscillator
The following diagram is the schematic of simple easily tuned / adjustable sine and square wave oscillator. This circuit provides sine and square wave at freque...
A simple DDS for 136kHz – Circuit Schematic
A simple DDS for 136kHz
The Hex switches are connected to J2 as follows: pin 1=common of both switches (+5V) 2=LSB up to 5=MSB of first switch. Then 6=LSB of second switch up to 9 whic...
Oscillator – Circuit Schematic
Oscillator
A tone generator that runs on as little as 1. 5 Vdc, using the Sallen-Key configuration. And finally, I`ll apply the tone generator to implement a phantom power...
State Variable Oscillator – Circuit Schematic
State Variable Oscillator
The major functional blocks necessary to design a general purpose audio oscillator, and give all the details of my current prototype. Implementation is in the m...
Softrock Lite II – Circuit Schematic
Softrock Lite II
The Local Oscillator stage implements a basic Colpitts Crystal Oscillator with a buffer stage to increase the signal level. The oscillator produces a signal tha...
Local Oscillator Stage – Circuit Schematic
Local Oscillator Stage
The current draw should be somewhere between 80 and 100 mA. The exact value is very much dependent upon the Si570, the version (CMOS vs LVDS), the frequency set...
Transistor Hartley Oscillator – Circuit Schematic
Transistor Hartley Oscillator
Any vacuum-tube oscillator configuration has an equivalent transistor circuit. For example, consider the vacuum-tube oscillator, illustrated in Fig. 6-1 (A), wh...
High-Frequency Oscillators – Circuit Schematic
High-Frequency Oscillators
High frequencies are here defined as those above 50, 000 cycles per second. For industrial power supply the Golpitts circuit, Fig. 28-1, or the coupled-grid sel...