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155-0080 circuit from 7623 manual

The Tektronix 155-0080-00 (M125) is a Tek-made vertical output amplifier integrated circuit in a stud-mounted can.

It is used as the vertical output stage in 100 MHz-class 76xx scopes and contains three cascoded differential gain stages, two of which use the "ft doubler" circuit invented by Carl Battjes.

Used in