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Frequent questions

  • [FAQ] RF synthesizers: If the datasheet shows all 1’s and 0’s in the register maps, do I have to program them?

    Some registers in the register maps do not have configurable register bits but they are fixed to some 1's and 0's, do we have to program these registers?

  • [FAQ] RF synthesizers: Can I modulate the internal VCO of a RF synthesizer?

    I want to do FM modulation with the internal VCO, is this possible? Can you tell me how to feed the modulation signal to the VCO?

  • [FAQ] How do I design a pulse width modulator (PWM) circuit using LMC555, TLC555, LM555, NA555, NE555, SA555, or SE555?

    Other Parts Discussed in Thread: LM293 How does the PWM example in the data sheet work? What are the limitations of the data sheet PWM example? Is there a way to improve linearity and duty cycle range?

  • [FAQ] How do I design a-stable timer, oscillator, circuits using LMC555, TLC555, LM555, NA555, NE555, SA555, or SE555?

    Other Parts Discussed in Thread: LMC555 , NE555 , LM555 , NA555 , TLC551 , SE555 , TLC552 , TLC555 , SA555 , CD4060B , CD4024B , CD4040B , CD4020B What is the difference between the part numbers? How is the output frequency and duty cycle set? Why…

  • [FAQ] How do I design monostable timer circuits using LMC555, TLC555, LM555, NA555, NE555, SA555, or SE555?

    Other Parts Discussed in Thread: LMC555 , NE555 , LM555 , NA555 , TLC551 , SE555 , TLC552 , TLC555 , SA555 , CD74HC4060 , SN74LV8154 This FAQ covers mono-stable circuits using the LM555, NA555, NE555, SA555, and SE555 timers that are called LM, NA, NE…

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