PAL fails to realize that injection locking an oscillator requires an oscillator > :-} His post was an attempt to output a subharmonic without...

PAL fails to realize that injection locking an oscillator requires an oscillator > :-} His post was an attempt to output a subharmonic without the oscillator. There are better ways to handle such a scenario. For example, see my boom-box machine (circa 1979)... Here is an injection-locked OSCILLATOR....

I have an application that requires a frequency input of no more than 2.5Vp. Most oscillator will swing close to the rail, in this...

I have an application that requires a frequency input of no more than 2.5Vp. Most oscillator will swing close to the rail, in this case 3.3V. I am planning on lowering the oscillator output by adding a couple diodes in series with Vdd to the oscillator, still in spec for the device. Any issues with this? (10MHz) Rich

Does anyone know the correct name for the 2 transistor LC oscillator that looks like a long tailed pair? I though it was a Franklin...

Does anyone know the correct name for the 2 transistor LC oscillator that looks like a long tailed pair? I though it was a Franklin oscillator - the google hits are ambiguous to say the least, but its possible I have the name wrong. Thanks for any help.

Hi, As an alternative to a bridge type setup I'm thinking of measuring a relatively low Q inductance (a lot of series resistance) by using...

Hi, As an alternative to a bridge type setup I'm thinking of measuring a relatively low Q inductance (a lot of series resistance) by using a tank circuit/oscillator. What kind of oscillator will be the least sensitive to the Q (oscillate closest to (2*pi* sqrt(LC))^-1?) ? And respond reasonably fast to changes in LC.. (seems like that's a conflicting requirement..) I have cont...

Hi, Ive got a radio that has rotary switch selection of crystals for the 1st local oscillator. I want to have electronic selection, where I can...

Hi, Ive got a radio that has rotary switch selection of crystals for the 1st local oscillator. I want to have electronic selection, where I can change the crystal selected by use of control lines. Can I use something like the 74HC4316 to do this without stuffing up the capacitance of the oscillator and pushing the crystals far off freq? The oscillator is a Colpitts type and the crystals ar...

The thread related to large signal PSpice models and an emitter follower comes from the following problem: I have an oscillator that should...

The thread related to large signal PSpice models and an emitter follower comes from the following problem: I have an oscillator that should drive a digital part of the system. In short, what is the best way to achieve this? My first attempt has been a common base Colpitts oscillator that gives a signal riding on the +Vcc rail. This has been AC coupled to a 74AC gate biased to the poin...

So here's a schematic of a standard LM386 power oscillator: http://www.interfacebus.com/lm386-square-wave-oscillator-circuit.jpg I have an...

So here's a schematic of a standard LM386 power oscillator: http://www.interfacebus.com/lm386-square-wave-oscillator-circuit.jpg I have an idea for a thing where what I'd like to have is a second LM386 oscillating at the same frequency and amplitude, but opposite phase as the first one, for push-pull drive. But I'd like to not use any further active parts other than the second LM386, if...

I'm trying to design an ultrasonic class C power oscillator to use with a project I'm working on. I'm vaguely basing it off a circuit I recall...

I'm trying to design an ultrasonic class C power oscillator to use with a project I'm working on. I'm vaguely basing it off a circuit I recall seeing in an early 1960s-era book called "Industrial Transistor Circuits". It seems I'm not remembering it correctly, and I don't really know much about the design of this type of oscillator as it's having some problems oscillating in simulation...

I'm buidling a little relaxaton oscillator for a project using a cd4093 quad nand gate with schmitt trigger inputs. I'm using a 200 ohm...

I'm buidling a little relaxaton oscillator for a project using a cd4093 quad nand gate with schmitt trigger inputs. I'm using a 200 ohm resistor and a 100n cap in the RC network. If I've done my calculations correctly, I was hoping to have an oscillator at around 30kHz. But my frequency counter is only showing around 8. Supply voltage is 5V. I understand that the frequency is depe...

Oscillator Proposal... Suppose I have a series RLC, one end grounded, the other end driven by a chip, how might I make that into an...

Oscillator Proposal... Suppose I have a series RLC, one end grounded, the other end driven by a chip, how might I make that into an oscillator? All wild ideas accepted... this is for a custom chip. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et ...

Could some electronics guru here please help ? What is the best way to select a transistor for an oscillator ? Consider a Colpitts oscillator...

Could some electronics guru here please help ? What is the best way to select a transistor for an oscillator ? Consider a Colpitts oscillator running at 5 MHz. The following are the analysis steps. 1. Select a value for the LC tank capacitor C1 = C2 = C 2. Select a load e.g., R=50 Ohm 3. To start oscillations, gmR > C2/C1. In this case gmR > 1 4. Using the oscillation frequency and

Is it at all possible to build an oscillator entirely from non-linear magnetics (OK, solid state diodes are allowed)? Best regards, Piotr

Is it at all possible to build an oscillator entirely from non-linear magnetics (OK, solid state diodes are allowed)? Best regards, Piotr

JFET Colpitts Oscillator is kind of L-C oscillator, but this scheme has one inductor and two capacitors. Now it can be simulated...

JFET Colpitts Oscillator is kind of L-C oscillator, but this scheme has one inductor and two capacitors. Now it can be simulated on: http://www.cirvirlab.com/simulation/jfet_colpitts_oscillator_online.php read more: http://www.cirvirlab.com/index.php/tutorials/128-jfet-colpitts-oscillator-simulation.html

New tutorial is ready http://www.cirvirlab.com/index.php/tutorials/127-jfet-hartley-l-c-resonant-circuit-oscillator-si mulation.html ...

New tutorial is ready http://www.cirvirlab.com/index.php/tutorials/127-jfet-hartley-l-c-resonant-circuit-oscillator-si mulation.html It now can be simulated on: http://www.cirvirlab.com/simulation/jfet_hartley_oscillator_online.php

Hi to all. I'm looking to make a small 433Mhz transmitter using bfr93's. I want to have a oscillator , followed by a small class c amp ,...

Hi to all. I'm looking to make a small 433Mhz transmitter using bfr93's. I want to have a oscillator , followed by a small class c amp , both using bfr93. Tho oscillator will be a standard Colpits oscillator , with a SAW resonator. I'd like to attach a class c amp (followed by filtering obviously) to boost the power. I've got a spice model for the BFR93 , from NXP. What I want to know is ...

I don't want anybody to design it for me, but in general how would you make an oscillator with a sine output of constant amplitude over a range...

I don't want anybody to design it for me, but in general how would you make an oscillator with a sine output of constant amplitude over a range of supply voltage (let's say the operating range of the op-amp). What I have in mind is a battery supply, but with no power wasted in a regulator. Sure the oscillator would also waste power but not as much. Would a square output be simpler? ...

Can someone suggest where I should look for a used tunable RF oscillator around 1 MHz that can be phase modulated from an external input?

Can someone suggest where I should look for a used tunable RF oscillator around 1 MHz that can be phase modulated from an external input?

If the power supply voltage is high, say > =3V, it is pretty simple to design an oscillator (of unimportant output frequency and shape), which...

If the power supply voltage is high, say > =3V, it is pretty simple to design an oscillator (of unimportant output frequency and shape), which can be powered from an AC power source: just add a diode bridge at the power input lines and use any suitable DC-powered oscillator circuit. But what if the supply voltage is really low, say 0.2V? JFET-based oscillators can go really low, allegedly down

Hello, I've designed a simple R/C-Oscillator with a MC14060 (ON-Semi) C-MOS Logic IC. It's easy to calculate withe the formula f=1/(2.3*R*C) But...

Hello, I've designed a simple R/C-Oscillator with a MC14060 (ON-Semi) C-MOS Logic IC. It's easy to calculate withe the formula f=1/(2.3*R*C) But I can't find information on the tolerances for this frequency in the datasheet. I know it will be quite a lot. I guess 30 to 40%? But to really know if I can handle this, I need to know what exactly the manufacturer guarantees. Do other manufacturers (...

What is the simplest way to get 480Hz from a crystal controlled oscillator? Looks like most of the pre-packaged XO's and VCXO, seem to put out...

What is the simplest way to get 480Hz from a crystal controlled oscillator? Looks like most of the pre-packaged XO's and VCXO, seem to put out much higher frequencies. Would a series of dividers be the best way? Thanks, Chris KQ6UP