公开(公告)号：US4689578A

公开(公告)日：1987-08-25

申请号：US845675

申请日：1986-03-28

Applicant: Stephen E. Spychalski

Inventor： Stephen E. Spychalski

IPC: H03F3/70 ,  H03F3/45

CPC classification number: G01V1/201 ,  H03F3/70 ,  H03F2200/261

Abstract: A differential charge amplifier design for a hydrophone pre-amplifier inces a calibration circuit for in situ measurement of the hydrophone/pre-amplifier gain. The hydrophone signal is input to a pair of amplifier stages which form a balanced differential input charge amplifier. The signal from the input charge amplifier is amplified by a second pre-amplifier stage and then passed to a balanced output cable driver. The calibration circuit is enabled by an external signal to inject a calibration signal into the input charge amplifier front end.

Abstract translation: 用于水听器前置放大器的差分电荷放大器设计包括用于原位测量水听器/前置放大器增益的校准电路。 水听器信号被输入到形成平衡差分输入电荷放大器的一对放大器级。 来自输入电荷放大器的信号由第二预放大器级放大，然后传递到平衡输出电缆驱动器。 校准电路由外部信号使能，将校准信号注入到输入电荷放大器前端。

公开(公告)号：US4644505A

公开(公告)日：1987-02-17

申请号：US619436

申请日：1984-06-11

Applicant: Stephen E. Spychalski

Inventor： Stephen E. Spychalski

IPC: B06B1/02 ,  H03H5/00 ,  H04R3/04

CPC classification number: H03H7/38 ,  B06B1/0215 ,  H04R3/04 ,  B06B2201/50 ,  B06B2201/74

Abstract: A broadband matching network for a Helmholtz resonator transducer is a series RL matching network capable of withstanding a high power level. The usable acoustic broadwidth is expanded to produce a symmetrical output over a broad frequency band.

Abstract translation: 用于亥姆霍兹谐振器的宽带匹配网络是能够承受高功率电平的RL系列匹配网络。 扩展了可用的声宽度，以在宽频带上产生对称输出。