Round 6: Tossup 10

Bob Wildar added emitter degeneration to a basic circuit named for this quantity, which he used three of in the 741 op amp’s design for biasing. A circuit named for this quantity, which uses only three transistors by incorporating a negative feedback loop, was developed over one night by George R. Wilson. Taking a differential pair and shorting the gate and drain together creates a “mirror” of this quantity, (15[1])which is ideally (15[1])zero at the (*) gate of a MOSFET. A ratio between two values of this quantity defines the BJT parameter beta. Any two-terminal linear circuit can be represented as a resistor in parallel with a source of this (10[1])quantity by Norton’s theorem. This quantity squared times R (10[1])gives the power radiated by a resistor. For 10 points, the “drain” value of what quantity for a transistor might be 1 milliamp? ■END■

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