13 Threads found on edaboard.com: Hartley Oscillator Design
One possible way to make an OP based hartley oscillator
Analog Circuit Design :: 12-13-2015 07:16 :: FvM :: Replies: 5 :: Views: 277
There are many topplogies for those frequencies like DRO,YIG, Ceramic Resonator oscillator, etc.
What kind of topology you intend to use ? What purpose will work for ???
Forget about Colpitts,hartley,Clapp oscillators and lumped L-C components they are not suitable for those frequencies.You should consider either Distributed type (...)
RF, Microwave, Antennas and Optics :: 12-01-2014 13:24 :: BigBoss :: Replies: 5 :: Views: 736
I made an opamp hartley oscillator using a certain electronics simulator and even though simulation takes place I'm unable to get any oscillation at all. I tried first using Rf and R1 equal to 1kΩ and two inductors both of whch are 50 mH. The capacitor value is 0.01 ?F. I've used a generic op-amp. I've attached a snapshot of the circuit.
Analog Circuit Design :: 06-05-2012 06:35 :: s.jayaram88 :: Replies: 12 :: Views: 5016
The above links show how to design an oscillator for a certain configuration, but I was unable to see an example of how this theory can apply to the design on a practical circuit such as a colptts or a hartley oscillator.
Does anyone know where I
RF, Microwave, Antennas and Optics :: 05-08-2012 05:49 :: obrien135 :: Replies: 10 :: Views: 1366
or in case of an ideal OP, one inductor is simply shorted. In other words, the resonant circuit is reduced to a single LC topology. As a result, the LC phase shift is smaller than 180° and the oscillation condition can't be fulfilled, at least for an ideal OP.
Yes, the first inductor of the
Analog Circuit Design :: 12-01-2011 04:18 :: LvW :: Replies: 7 :: Views: 2104
Please verify if the circuit looks fine or not.
One thing I would like to ask is that what amplitude of oscillations is generally acceptable? I have designed oscillators with 1-2V peak magnitude and also in uV range like this one is around 90mV peak.
According to me if I manipulate RC (in BJT) or RD (in JFET) I can increase this le
Analog Circuit Design :: 03-20-2010 05:11 :: abbeyromy :: Replies: 3 :: Views: 5302
Please tell me the procedure for designing an hartley or colpitt oscillator( with voltage divider bias).any links or something. I need the mathematical procedure. plz...
RF, Microwave, Antennas and Optics :: 02-15-2010 12:03 :: Shweta_S :: Replies: 1 :: Views: 1276
I want to design a local oscillator for a FM radio receiver. I have tried many oscillators i.e. colpitt oscillator, hartley oscillator. But they are not working well. Another issue which i am facing is the stability. When the Capacitor / Indusctor is changed to select different frequencies, (...)
Analog Circuit Design :: 03-31-2009 13:22 :: mm_pk1 :: Replies: 0 :: Views: 1495
You can design an RC or LC oscillator, or obtain the signal by frequency division from a higher frequency oscillator/ microcontroller, if you already use it in your project.
For RC, design a Wien bridge or phase shift oscillator. For LC, the classical types hartley, Colpitts... . For (...)
Analog Circuit Design :: 04-02-2008 10:47 :: Eugen_E :: Replies: 7 :: Views: 3893
i need to build collpits, hartley, and clapp oscillator using transistor, but i'm confused on the design step. anybody can help me??
Analog Circuit Design :: 05-23-2007 05:03 :: ex4 :: Replies: 0 :: Views: 1046
I would like to build a circuit for a hartley oscillator and was wondering what design to best go for. The frequency should be around 500MHz. So I was thinking about whether to use discrete components and use an ugly board construction or rather go and buy an oscillator chip to which I can attach external (...)
Analog Circuit Design :: 10-05-2006 04:39 :: svensl :: Replies: 2 :: Views: 1579
i have a problem about our project to design a hartley's oscillator which will have an output of 2 MHz. in our textbook there is a circuit that uses an amplifier but as i have searched in the internet i didn't see any circuit that uses an amplifier.
please if you have an idea there can you help me!! :cry:
Analog Circuit Design :: 09-16-2006 22:45 :: mark1166 :: Replies: 1 :: Views: 967
I want to construct one AM transmitter which can transmit high frequency(High bit rate) signals.. For example,DTMF signals..
First step i want to build one oscillator which will provide good wave form out put(Clear wave form).. I am planning to go for hartley.. It seems if we design it using crystal,it will yeild better reslut.. (...)
RF, Microwave, Antennas and Optics :: 06-22-2006 07:58 :: dineshbabumm :: Replies: 0 :: Views: 989