Probe for LCD Backlight


Posted on Oct 28, 2012

Figure 1s circuitry meets the discussed requirements. It signal conditions a commercially available clip-on current probe with a precision amplifier to provide 1% measurement accuracy to 10MHz. The clip-on probe provides convenience, even in the presence of the high common voltages noted. The current probe biases A1, operating at a gain of about 3.75.



No impedance matching is required due to the probes low output impedance termination. Additional amplifiers provide distributed gain, maintaining wide bandwidth with an overall gain of about 200. The individual amplifiers avoid any possible cr




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