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Recent content by JPdP

  1. J

    ??? Basics on generator & motor design

    Could anybody refer me to any good and easy to under stand basics on the design of generators with a high output power. I'm knew to this field and don't really know where to start. Any help would greatly be appriciated. Regards
  2. J

    Recommend me a 1kHz oscillator

    1khz oscillator simple Where can I get hold of the Spice models of these Chips: 74HC14, 4093 regards
  3. J

    Recommend me a 1kHz oscillator

    I need a 1kHz oscillator to transmit a 1kHz signal from an IR Tx. Any help would be apreciated. Needs to be Cheap and simple. Regards
  4. J

    Winding of an air core inductor?

    air inductor calculator mm winding Need to wind an 8.2 uH inductor. The insulated wires I've got, are 0.45mm, 0.5mm, 0.71 and 0.56mm. I've search the web for calculators, but no downloadable "single layer air core calculator' were to be found. Should I rather wind an inductor with more layers...
  5. J

    Whats the best way to control DC motor used in Small robots

    DC motor controle ??? Which is the best ways of controlling an DC motors used in Small robots? Are there any online books or documetations on Robotics and the controlling of DC motors? All help will be apreciated!!! Regards
  6. J

    How can I get the frequency of a marker for ADS equation

    ads equation How can I get the frequency of a marker? I would like to use the frequency of a marker in an equation. regards
  7. J

    Specs for Oscillators???

    I'm new to the world of Oscillators and would like to know what the specification for a 10.245 MHz crystal controlled Colpitts oscillator should be? Which specification are importend to look at? I've search a lot of databases for any books, papers, magazines, etc for information but could not...
  8. J

    Stable CE to unstable CE ?

    I've tried the AT41470, AT41486 and BFP420 transistors @ 4.7GHz. In common base they are unstable, but I need to know if it is possible to make these transistors unstable in Common Emitter configuration. I'm busy researching DRO's using BJT's and would like to learn these techniques/tricks...
  9. J

    Stable CE to unstable CE ?

    I would like to use the CE topology for an DRO Oscillator design but, I just doen't get the topology unstable. I've tried an inductor and later an capacitor in shunt with a resistor at the emitter to ground, to see if I can get K < 1 , |S11| and |S22| >1. I just can't get it to work. Any...
  10. J

    Replacement for MRF 559 transitor ??

    mrf559 Do you know of any replacements for an MRF 559 transistor? It must be stable at 500 MHz Regards
  11. J

    Harmonic Balance Simulation in ADS

    What is this "TL" between the resonater and the Gate?
  12. J

    Is it possible to simulate a DR (puck) in ADS?

    ads simulation (DR's ?) Hi Is it possible to simulate a DR (puck) in ADS? It's for an Oscillator design. I would greatly apreciate some help. regards
  13. J

    BFP420 Transitor model

    bfp420 I want to build a 4GHz oscillator using this device. In order to do that i need to simulate the circuit in ADS. This is where my problem lies, ADS does not have the Linear (S-parameter) model available. For those who know about ADS, it is the model that is specified according to its Vce...
  14. J

    DR Oscillator @ 4.7GHz (using a puck)

    Designing a Low Phase Noise Osscillator operating at a frequency of 4.7 GHz. I'm thinking of using a puck resonator and a transitor in Common Base. Are there any websites that has examples of how to design such an oscillator or any other type of resources that would help me? Regards

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