Circuit and method for automatically turning off an iontophoresis system
First Claim
Patent Images
1. A controller for an iontophoretic drug delivery apparatus, comprising:
- a current control circuit;
error detection circuitry for detecting at least one error condition within the apparatus; and
a control circuit including a microprocessor capable of controlling said current control circuit, said control circuit being capable of disabling itself from reading instruction when said error detection circuitry detects the at least one error condition, said controller further comprising power-on reset circuitry to ensure that said control circuit is not disabled when power is initially applied.
6 Assignments
0 Petitions
Accused Products
Abstract
A fail-safe iontophoretic drug delivery apparatus and a corresponding method is provided. The apparatus includes a current generating circuit for sending a current through a patch, error detection circuitry, and a control circuit. The control circuit controls the current generating circuit. When errors are detected in the apparatus, the control circuit stops the current and disables itself.
23 Citations
24 Claims
-
1. A controller for an iontophoretic drug delivery apparatus, comprising:
-
a current control circuit; error detection circuitry for detecting at least one error condition within the apparatus; and a control circuit including a microprocessor capable of controlling said current control circuit, said control circuit being capable of disabling itself from reading instruction when said error detection circuitry detects the at least one error condition, said controller further comprising power-on reset circuitry to ensure that said control circuit is not disabled when power is initially applied. - View Dependent Claims (2, 3, 4)
-
-
5. A controller for an iontophoretic drug delivery apparatus, comprising:
-
a current control circuit; means for providing a clock signal; error detection circuitry for detecting at least one error condition within the apparatus; and a control circuit capable of controlling said current control circuit, said control circuit having a clock input, said control circuit being capable of operating only when a clock signal is applied to the clock input, said control circuit being further capable of stopping the clock signal applied to the clock input when said error detection circuitry detects the at least one error condition. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
-
-
13. A controller for an iontophoretic drug delivery apparatus, comprising:
-
a current control circuit; means for providing a clock signal; a data storage device having an output, wherein the output is in a first state when certain data is stored in said data storage device, and is not in the first state when the certain data is not stored in said data storage device; a control circuit capable of controlling said current generating circuit and capable of causing the certain data to be stored into said data storage device, said control circuit having a clock input, said control circuit being capable of operating only when a clock signal is applied to the clock input; a logic circuit having an output connected to the clock input of the control circuit, a control input connected to the output of the data storage device, and a clock input adapted to receive a first clock signal, wherein a second clock signal is produced at the logic circuit output only when the data storage device output is not in the first state; error detection circuitry for detecting at least one error condition within the system; and power-on reset circuitry to ensure that the certain data is not stored in said data storage device when power is initially applied, wherein said control circuit causes the certain data to be stored in said data storage device when said error detection circuitry detects the at least one error condition, and wherein said current generating circuit is shut off when the certain data is stored in said data storage device. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A method of shutting down an iontophoretic drug delivery system, comprising the steps of:
-
providing a clock signal; controlling an iontophoretic current using a control circuit having a clock input, the control circuit being capable of operating only when a clock signal is applied to the clock input; detecting at least one error condition within the system; and generating a signal by the control circuit that stops the clock signal from being delivered to the clock output after the at least one error condition is detected in said detecting step. - View Dependent Claims (21, 22)
-
-
23. A method of shutting down an iontophoretic drug delivery system, comprising the steps of:
-
controlling an iontophoretic current using a control circuit including a microprocessor capable of being disabled; detecting at least one error condition within the system; and disabling the ability of the control circuit microprocessor from reading instructions after the at least one error condition is detected in said detecting step. - View Dependent Claims (24)
-
Specification