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: 766
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: 1325
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: 1023
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 :: 05.06.2012 06:35 :: s.jayaram88 :: Replies: 12 :: Views: 3074
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: 822
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: 1141
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: 1089
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: 4736
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: 603
i am not sure whether you can generate fm modulator by using colpitts oscillator but surely u can design fm using hartleys oscillator by replacing the capacitor in the tank circuit by a varicap....
Analog Circuit Design :: 19.09.2011 13:08 :: srikanth1555 :: Replies: 8 :: Views: 1001
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: 1509
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: 717
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: 1354
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: 3233
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: 7038
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: 967
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: 398
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: 557