155-0080-00

155-0080 circuit from 7623 manual

The Tektronix 155-0080-00 (M125) is a Tek-made vertical output hybrid 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 "f_t doubler" circuit invented by Carl Battjes.

The 155-0080-00 consists of the main amplifier IC with 14 transistors, plus two D058 output transistors, all attached to the same ceramic substrate.

Used in

• 7603 / R7603 (U450)
• 7613 / R7613 (U450)
• 7623 (U450, in non-A version only - 7623A uses discrete vertical amp like 7633)

Links

• 7603 Mod. 36005 (1979): Prevent >1 GHz oscillations in vertical amplifier

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