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1541 CIRCUIT THEORY
Write Amplifier Circuits
During a write operation, B must be "high". This forward biases Q7 and CR14. If _B goes "low", Q3 and Q6
become forward biased. If Q goes "low", Q5 and CR15 become forward biased, passing current flow through
R/W 1. If _Q goes "low", Q4 and CR18 become forward biased, passing current flow through R/W 2.
When a write operation occurs, the ERASE coil is energized by forward biasing Q6. This
demagnetizes the outer edges of the track, preventing data on one track from bleeding into the
next track.
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