Jim Williams

Jim Williams

Areas of interest of the author: Oscillators Analogue Design Measurement Supply

Publications on RadioLocman by the author Jim Williams:

  1. 9 ppm distortion, quartz stabilized oscillator
    A spectrally pure sine wave oscillator is required for data converter; filter and audio testing. Figure 1 provides a stable frequency output with extremely low distortion. This quartz stabilized 4 kHz oscillator has less than 9 ppm (0.0009%) distortion in its...
    09-03-2023
  2. 90 µA Precision Voltage-to-Frequency Converter
    Figure 1 is a micropower voltage-to-frequency converter. A 0 V to 5 V input produces a 0 kHz to 10 kHz output with a linearity of 0.05%. Gain drift is 80 ppm/°C. Maximum current consumption is only 90 µA, almost...
    02-03-2023
  3. Dynamic-Load Circuit Determines a Battery's Internal Resistance
    The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value – often a few milliohms – depends on the battery's electrochemical condition and construction. If you attempt to use an ordinary ac...
    16-06-2022
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