Oscillation Circuit Evaluation Methods
What is "Startup Time" (2) <Measuring method>
Overview: Obtain the startup data of the oscillator circuit with a voltage probe of low capacitance/high impedance voltage probe and read it with an oscilloscope.
|-1||Contact the tip of a voltage probe with low capacitance/high impedance (using a FET probe in NDK) to the measurement point (input terminal of the target oscillator circuit).|
|-2||Connect the FET probe to the oscilloscope input channel.|
|-3||Set the oscilloscope trigger level appropriately so that the startup waveform can be obtained.|
|-4||Apply a predetermined voltage to the target oscillation circuit and start oscillation (start-up waveform is acquired immediately after the start of oscillation).|
|-5||Read the startup time from the startup waveform (refer to What is "Startup TimeImprovement method (1) ).|
Fig. 1 shows an example of the state immediately after the measurement procedure (5).