Electrical signal supply with separate voltage and current control for an electrical load
First Claim
Patent Images
1. An electrical signal supply apparatus comprising:
- (a) voltage control circuitry for applying a voltage to an electrical load to produce an electrical current through the electrical load, wherein the electrical load comprises skin tissue; and
(b) current control circuitry having a variable electrical impedance, the current control circuitry for electrical coupling in series with the electrical load for sensing the electrical current passing through the electrical load and for adjusting the variable electrical impedance based on the sensed electrical current to maintain a relatively constant electrical current passing through the electrical load.
1 Assignment
0 Petitions
Accused Products
Abstract
An electrical signal supply apparatus independently controls and regulates voltage and current in supplying microampere currents to skin tissue of patients. The apparatus enables operators to select a desired voltage level independent of the requirement to maintain current through the skin tissue at a relatively constant level. The apparatus includes a switching regulator in combination with an electric voltage doubling network and potential divider network to enable the supply of increased voltages.
293 Citations
22 Claims
-
1. An electrical signal supply apparatus comprising:
-
(a) voltage control circuitry for applying a voltage to an electrical load to produce an electrical current through the electrical load, wherein the electrical load comprises skin tissue; and (b) current control circuitry having a variable electrical impedance, the current control circuitry for electrical coupling in series with the electrical load for sensing the electrical current passing through the electrical load and for adjusting the variable electrical impedance based on the sensed electrical current to maintain a relatively constant electrical current passing through the electrical load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An electrical signal supply apparatus comprising:
-
(a) voltage control means for applying a voltage to skin tissue to produce an electrical current through the skin tissue; and (b) current control means having a variable electrical impedance, the current control means for electrical coupling in series with the skin tissue for sensing the electrical current passing through the skin tissue and for adjusting the variable electrical impedance based on the sensed electrical current to maintain a relatively constant electrical current passing through the skin tissue. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
-
21. An electrical signal supply apparatus comprising:
-
(a) voltage control circuitry for applying a voltage to an electrical load to produce an electrical current through the electrical load; and (b) current control circuitry having a variable electrical impedance, the current control circuitry for electrical coupling in series with the electrical load for sensing the electrical current passing through the electrical load and for adjusting the variable electrical impedance based on the sensed electrical current to maintain a relatively constant electrical current passing through the electrical load, wherein the voltage control circuitry has a variable electrical impedance for setting the voltage applied to the electrical load, and wherein the voltage control circuitry comprises a programmable processor for controlling the variable electrical impedance of the voltage control circuitry.
-
-
22. An electrical signal supply apparatus comprising:
-
(a) voltage control circuitry for applying a voltage to an electrical load to produce an electrical current through the electrical load; and (b) current control circuitry having a variable electrical impedance, the current control circuitry for electrical coupling in series with the electrical load for sensing the electrical current passing through the electrical load and for adjusting the variable electrical impedance based on the sensed electrical current to maintain a relatively constant electrical current passing through the electrical load, wherein the current control circuitry comprises a programmable processor for controlling the variable electrical impedance of the current control circuitry.
-
Specification