基本信息
摘要：921,220. Echo-sounders. ELECTROACUSTIC G.m.b.H. July 17, 1959 [July 19, 1958], No. 24640/59. Class 40 (7). In a pulse echo-sounder circuit arrangement, oppositely-poled, shunt-connected, semi-conductor diodes 3 are utilized in one or both of the leads from transmitter 1 output transformer 2 to the transducer 5. Interfering voltages from the transmitter between pulses do not appear at the input of receiver 9, which may include diode circuit 8. In another arrangement transducer 5 is in parallel with points c, d, Fig. 2 (not shown).
摘要附图：
