| 摘要 |
879,280. Phase-sensitive circuits. GOODYEAR TIRE & RUBBER CO. March 7, 1960 [May 22, 1959], No. 7928/60. Class 38 (4). [Also in Groups XXXIV, XXXVI and XXXVIII] In a phase-sensitive detector for use with an A.C. bridge network the unbalance signal is amplified by transistors 49, 50 (Fig. 6) and the reference signal is obtained from a transformer winding 53 which is part of the bridge energizing transformer 22. The transistors are biased by resistors 51, 52 connected to opposite ends of the winding 53. |
