公开(公告)号：DE3374221D1

公开(公告)日：1987-12-03

申请号：DE3374221

申请日：1983-08-02

Applicant: IBM

Inventor： GALWEY RONALD KEITH ,  KANAZAWA KAY KEIJI

IPC: C25D21/12 ,  G01N27/28 ,  G01N27/416 ,  G01R19/00 ,  G01N27/46

Abstract: O An electronic instrument for use with an electrochemical cell that provides IR compensation while operating as either a galvanostat or a potentiostat The instrument includes an electronic circuit 10 having two output terminals, an input differential amplifier circuit 22, an output differential amplifier circuit 30, a control differential amplifier circuit 38, a reference differential amplifier circuit 48, a resistor, electric circuitry connecting the input terminal of the control amplifier to the instrument output terminal and a double pole, a double throw switch means 56. In a preferred embodiment, the electric circuitry connecting the control amplifier to the instrument output terminal is a potentiometer.

公开(公告)号：DE3277082D1

公开(公告)日：1987-10-01

申请号：DE3277082

申请日：1982-04-27

Applicant: IBM

Inventor： GALWEY RONALD KEITH ,  KANAZAWA KAY KEIJI

IPC: G01N27/26 ,  G01D3/028 ,  G01N27/416 ,  G01N27/48 ,  G01N27/49 ,  G01N27/28

Abstract: Analytical apparatus comprises an electrolytic cell (10) comprising a counter electrode (12) and a reference electrode (14). Working electrodes (16, 18) are positioned equidistantly and symmetrically from the counter and reference electrodes. Currents through the electrolyte between the working electrodes and the cell wall are induced by energising the counter electrode through a differential amplifier (22). Further differential amplifiers (32, 34) coupled to the respective working electrodes provide analysis output signals at output terminal 30.

公开(公告)号：DE3166605D1

公开(公告)日：1984-11-15

申请号：DE3166605

申请日：1981-07-23

Applicant: IBM

Inventor： GALWEY RONALD KEITH ,  KANAZAWA KAY KEIJI

IPC: G05F1/46 ,  G01N27/48

公开(公告)号：DE3065493D1

公开(公告)日：1983-12-15

申请号：DE3065493

申请日：1980-02-21

Applicant: IBM

Inventor： GALWEY RONALD KEITH ,  KANAZAWA KAY KEIJI

IPC: H02J7/00 ,  G01N27/26 ,  G01N27/416 ,  G01N27/49 ,  G05F1/10 ,  C25B15/02 ,  H02H7/00

Abstract: An improved potentiostat for use with electrochemical cells provides dynamic protection of both the electrochemical cell elements and the sensitive potentiostat components from any significant voltage or current overload. A comparator compares the potentiostat input voltage with the electrochemical cell reference electrode voltage. When the reference electrode voltage becomes substantially different from the potentiostat input voltage and exceeds a certain preset value, the comparator activates a control means that causes the cell current to go to zero. This system provides dynamic protection even as the input voltage varies.