Design of AC Computing Amplifiers Using Transistors
C. A. Krause, R. R. Lowe · IEEE Transactions on Electronic Computers · 1958
A design philosophy for transistorized analog computing amplifiers is presented. A design procedure for a summing amplifier to drive a specific resolver in a 400 cps system is described, and the performance of the resulting circuit is evaluated. Whereas experience with vacuum tube amplifiers in similar applications has led to the conclusion that the amplifier input impedance should be as large as possible, the inverse is true in the transistor amplifier.