POTENTIOSTAT/GALVANOSTAT WITH DIGITAL INTERFACE

摘要

A potentiostat/galvanostat employs a controller for providing digital control signals to a digital-to-analog converter (DAC) that generates an analog output signal in response to digital control signals. A high current driver produces a high current output in response to the analog output signal from the DAC. A high current monitor monitors the output from the high current driver to produce a feedback signal for the high current driver to control the current produced by the high current driver and to produce an output dependent on the current supplied from the high current driver for monitoring by the controller. A counter electrode contact for a counter electrode is connected with the output of the high current monitor. A working electrode contact for a working electrode is electrically connected with a fixed stable voltage potential to enable electrochemical analysis of material between the counter electrode and the working electrode. A low current driver produces a low current range output in response to an analog output signal from the DAC. A low current monitor monitors the working electrode contact to detect current at the working electrode contact to supply an output dependent on the current detected for monitoring by the controller and for providing a feedback signal to the low current driver in order to control the output of the low current driver to control current between the counter electrode contact and the working electrode contact.

主权项

1. An electrochemical instrument comprising:
a. a controller for providing digital control signals; b. a digital-to-analog converter (DAC) in electrical communication with the controller for generating an analog output signal in response to digital control signals from the controller; c. a high current driver in electrical communication with the DAC to produce a high current range output in response to the analog output signal from the DAC; d. a high current monitor in electrical communication with the high current driver, the high current monitor producing a current feedback signal for the high current driver in response to the current monitored by the high current monitor to control the current produced by the high current driver and for supplying an output dependent on the current produced from the high current driver for monitoring by the controller. e. a counter electrode contact for electrical communication with a counter electrode and connectable in electrical communication with the output of the high current monitor; and f. a working electrode contact for electrical communication with a working electrode connectable in electrical communication with a fixed stable voltage potential for enabling electrochemical analysis of material between the counter electrode and the working electrode, wherein the high current monitor includes a first high current range monitoring circuit for monitoring current in a first current range and a second high current monitoring circuit for monitoring current in a second current range.