公开(公告)号：US3605008A

公开(公告)日：1971-09-14

申请号：US3605008D

申请日：1968-09-18

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SHOEMAKER WILLIAM E ,  WEEKES BARRET B

IPC: G01D5/12 ,  G01R17/10

CPC classification number: G01D5/12

Abstract: A transducer network having a multiplicity of branches and related circuit nodes is connected to a constant current supply providing a multiplicity of constant current sources. Branches and nodes of the network which are remotely located from the current sources are connected to the current sources by conductors exhibiting an inherent impedance. A pair of input terminals of a high input impedance amplifier is connected to a pair of nodes of the transducer network.

公开(公告)号：US3457493A

公开(公告)日：1969-07-22

申请号：US3457493D

申请日：1966-01-25

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SHOEMAKER WILLIAM E ,  WEEKES BARRET B

IPC: G01K7/24 ,  G01L1/22 ,  G05F1/46 ,  G05F1/40 ,  G05F1/52 ,  H02J1/04

CPC classification number: G01K7/24 ,  G01L1/225 ,  G05F1/46 ,  Y10T307/352 ,  Y10T307/422 ,  Y10T307/565 ,  Y10T307/593

公开(公告)号：US3304507A

公开(公告)日：1967-02-14

申请号：US34341664

申请日：1964-02-07

Applicant: BECKMAN INSTRUMENTS INC

Inventor： WEEKES BARRET B ,  SMITH LELAND B

IPC: G11C27/02

CPC classification number: G11C27/026

公开(公告)号：US3248569A

公开(公告)日：1966-04-26

申请号：US29077863

申请日：1963-06-26

Applicant: BECKMAN INSTRUMENTS INC

Inventor： WEEKES BARRET B

IPC: H03G11/02

CPC classification number: H03G11/02

公开(公告)号：US3304506A

公开(公告)日：1967-02-14

申请号：US34340764

申请日：1964-02-07

Applicant: BECKMAN INSTRUMENTS INC

Inventor： WEEKES BARRET B

IPC: G11C27/02 ,  H03F1/36

CPC classification number: H03F1/36 ,  G11C27/026

公开(公告)号：US3582802A

公开(公告)日：1971-06-01

申请号：US3582802D

申请日：1969-07-16

Applicant: BECKMAN INSTRUMENTS INC

Inventor： WEEKES BARRET B ,  SHOEMAKER WILLIAM E

IPC: H03F3/343 ,  H03F3/45 ,  H03F1/38 ,  H03F3/68

CPC classification number: H03F3/343 ,  H03F3/45479

Abstract: A direct coupled multistage differential amplifier having high common mode rejection including means for deriving the common mode signal from the last differential stage and coupling such signal back to the first stage and at least one additional stage by way of a feedback path having a gain greater than one. The derived common mode signal is connected through the feedback path to at least one voltage point of the power supply being impressed across the differential stages to drive the power supply voltage in sympathy with the common mode signal appearing at the differential signal input.

公开(公告)号：US3495182A

公开(公告)日：1970-02-10

申请号：US3495182D

申请日：1964-01-17

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SMITH LELAND B ,  WEEKES BARRET B

IPC: H03F3/45 ,  H03F1/32 ,  H03F3/04

CPC classification number: H03F3/45479

公开(公告)号：US3173096A

公开(公告)日：1965-03-09

申请号：US19191562

申请日：1962-05-02

Applicant: BECKMAN INSTRUMENTS INC

Inventor： KARL HINRICHS ,  WEEKES BARRET B

IPC: H03G7/06

CPC classification number: H03G7/06