18 Threads found on edaboard.com: Hartley Oscillator Design
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 :: 22.06.2006 07:58 :: dineshbabumm :: Replies: 0 :: Views: 717
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 :: 05.10.2006 04:39 :: svensl :: Replies: 2 :: Views: 1275
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 :: 08.05.2012 05:49 :: obrien135 :: Replies: 10 :: Views: 931
I know, this circuit can be found in the internet. However, it does not work.
Why not? It is derived from the original hartley BJT circuit without considering that the BJT acts as a current source.
That means: Large output resistance.
In your circuit and with Rout=0 the inductor L0 is useless as it acts as a load only and has no influence on feedba
Analog Circuit Design :: 05.06.2012 07:01 :: LvW :: Replies: 12 :: Views: 2737
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 :: 23.05.2007 05:03 :: ex4 :: Replies: 0 :: Views: 737
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 :: 31.03.2009 13:22 :: mm_pk1 :: Replies: 0 :: Views: 1080
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 :: 15.02.2010 12:03 :: Shweta_S :: Replies: 1 :: Views: 1056
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 :: 20.03.2010 05:11 :: abbeyromy :: Replies: 3 :: Views: 4630
Thx Tony. Do u hv any suggest on VCO? i've searched through the google, there were lots of oscillator design, colpitts (series or paralle) , hartley. I've no idea which 1 i should choose.
Is there any simulation could be used before going to actual design?
I;m currently using ADS software, i was wondering how can i use (...)
RF, Microwave, Antennas and Optics :: 01.06.2011 21:51 :: ericyeoh :: Replies: 11 :: Views: 570
About this there is so much literature on the web available, including explanations and tutorials.
Analog Circuit Design :: 01.10.2011 08:59 :: erikl :: Replies: 8 :: Views: 946
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 :: 01.12.2011 04:18 :: LvW :: Replies: 7 :: Views: 1370
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 :: 16.09.2006 22:45 :: mark1166 :: Replies: 1 :: Views: 687
My 5 cents worth:
Generally, I not think that you would find a VCO at 5Ghz in Hspice.
I personally have not implemented a VCO before but I guess you should started by characterizing your MOS transistor in your PDK to know the cutoff frequency (RF MOS is used most frequently for these application). If the Q factors for your passive components
Analog Circuit Design :: 09.01.2007 09:44 :: wchu01 :: Replies: 5 :: Views: 1302
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 :: 02.04.2008 10:47 :: Eugen_E :: Replies: 7 :: Views: 3117
I have got an old short wave diathermy machine to be updated from analog control to digital one. It was made on 1996 by some students of undergraduate. I don't have any final year report as it was misplaced long ago. I am tracing schematic of that circuit, it's taking me time because it's too untidy and worst kind of wiring is done, which I never h
Analog Circuit Design :: 18.09.2008 18:41 :: umery2k75 :: Replies: 4 :: Views: 6739
I have tried crystal oscillators, colpitts, hartley, clapp and others too but I can't remember their names. I have tried VCO's also but mainly resonant tank circuit types with the 14-380pF air variable tuning cap (dual ganged). It is for a local oscillator on a 40M SSB transceiver. Maybe I should have chosen a lower IF, but I thought I (...)
RF, Microwave, Antennas and Optics :: 09.02.2011 12:26 :: obrien135 :: Replies: 3 :: Views: 922
It looks like this circuit is from this site.
It's not a common design, so the website should really explain it, but it doesn't.
As far as I can tell, that Q1 portion is a hartley oscillator. if it had been drawn in a nicer way, it would have been
easier to figure out. Th
Analog Circuit Design :: 23.06.2012 11:06 :: sky_123 :: Replies: 2 :: Views: 366
You were missing a link in your post. I was planning to build an RF siggen too, and I was planning to use many hartley oscillators (if you are winding your own coils anyway, then it is not expensive), and space for a future PLL. However, you need to build a lot of oscillators to cover a reasonable spectrum (I wanted to go to 500MHz). And, (...)
RF, Microwave, Antennas and Optics :: 23.12.2012 13:14 :: sky_123 :: Replies: 4 :: Views: 493