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Component values on your boards may have shifted enoughto causetransistors to be improperly biased
1 ) a component failure in the driver circuitcausingincorrect biasing of one transistor
to provide class AB(passive) is setTransistor bias
a variation of the thresholdcausesthe transistor being no longer correctly biased
as we may get resistive couplingcausingtransistor bias problems
from discrete components using biasing techniques known by those of skill in the art(passive) may be createdBiased transistor 192
When the control voltage applied to the page or charge control terminal 27 goes low , the output of inverter 28 goes high ,causingtransistor 29 to be biased off
orderto causetransistor 183 to be biased OFF
If VPROG is reduced during the test mode , transistor 74n will source current through resistor 58nto causetransistor 52n to be biased off
The firing and latching of SCR1causestransistor Q16 to be biased ON
parasitic bipolar transistors from switching on and subsequently shorting out the dieto preventparasitic bipolar transistors from switching on and subsequently shorting out the die
the effects I describedcould causethe effects I described
it to be saturatedwrongly causingit to be saturated
the hysteresis effect(passive) caused bythe hysteresis effect
the leakage currents(passive) caused bythe leakage currents
the voltage on the bias node and thereby sets the operating state of the current reference circuitsetsthe voltage on the bias node and thereby sets the operating state of the current reference circuit
the collector potential of transistor Q.sub.17 and conductor 191 to go highto causethe collector potential of transistor Q.sub.17 and conductor 191 to go high
in transistor Q9 � pulling � current from the load via the output terminal Voutresultingin transistor Q9 � pulling � current from the load via the output terminal Vout
in transistor Q8 � pushing � current to a load via output terminal Voutresultingin transistor Q8 � pushing � current to a load via output terminal Vout
to regulate the current through itselfdesignedto regulate the current through itself