公开(公告)号：US3530305A

公开(公告)日：1970-09-22

申请号：US3530305D

申请日：1969-04-01

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： LOFTUS WALLACE D

IPC: G01R31/26 ,  H03K17/13 ,  H01H9/56

CPC classification number: G01R31/2637 ,  H03K17/136

公开(公告)号：US3896313A

公开(公告)日：1975-07-22

申请号：US43395974

申请日：1974-01-16

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： BERMAN HERBERT A ,  CAMPBELL ROBERT B ,  LOFTUS WALLACE D

IPC: G01J1/44 ,  G01J1/42 ,  H01L31/10 ,  G01T1/24

CPC classification number: G01J1/4228

Abstract: A photodetector apparatus is provided having an output only when exposed to electromagnetic radiation above or below a specified cut-off frequency. At least first and second light sensor means produce electrical signals responsive to electromagnetic radiation of first and second overlapping frequency ranges, respectively, and peak electrical responses at different first and second peak frequencies, respectively. Electrical means compare the electrical signals from at least said first and second light sensor means and produces an electrical signal preferably of only one polarity and equal to a product of a first constant times the amplitude of the electrical signal produced by said first light sensor means minus a product of a second constant times the amplitude of the electrical signal produced by said second light sensor. The apparatus is particularly useful in ultraviolet detection where the sensor means are comprised of separate silicon carbide semiconductor bodies each containing a PN junction.

公开(公告)号：US3634747A

公开(公告)日：1972-01-11

申请号：US3634747D

申请日：1969-10-20

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： LOFTUS WALLACE D

IPC: G01R1/28 ,  H03F3/45 ,  H02M1/08

CPC classification number: H03F3/45475 ,  G01R1/28 ,  H03F2203/45612

Abstract: The invention is an electronic current to voltage converter circuit including a temperature compensating circuit, a differential amplifier circuit, a feedback circuit, and an input voltage zero adjust circuit for establishing and maintaining the input voltage signal to the circuit substantially zero to permit virtual short circuit current measurements of signals developed by a current generating device.

Abstract translation: 本发明是一种电子电流 - 电压转换器电路，其包括温度补偿电路，差分放大器电路，反馈电路和输入电压零点调整电路，用于建立和维持输入电压信号至电路基本为零以允许虚拟短路 由电流发生装置开发的信号的电流测量。