But if they draw some idle current and if they have a diode for reverse polarity protection, then the reversing trick might keep the batteries fresher, but at the cost of losing the clock time or the stored settings or whatever . talk ) 22 : 36, 3 November 2013 ( UTC)
2.
On June 10, 2014, Kevin Hayes was issued U . S . Patent 8, 749, 310 for " amplifier bias control . " This patent covers the only known technique for observing the true underlying quiescent current ( idle current ) of an output tube ( or transistor ) under dynamic signal conditions, and then holding it to the stable target value with a precision of 99 % or better.
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