Apparatus and method for implementing a differential drive amplifier and a coil arrangement
First Claim
1. An apparatus, comprising:
- a first coil having a planar spiral configuration with a spacing between turns of the first coil increasing from an outer edge of the first coil toward a center of the first coil; and
a second coil having a planar spiral configuration with a spacing between turns of the second coil increasing from an outer edge of the second coil toward a center of the second coil, wherein the first coil and the second coil are configured to transfer wireless power via a magnetic field to one or more receive coils.
1 Assignment
0 Petitions
Accused Products
Abstract
Exemplary embodiments are directed to differentially driving a load. An apparatus includes a differential drive amplifier including a switching device coupled with a first output node and a second output node. The first output node and the second output node drive a load network including primary coils. The differential drive amplifier also includes a drive circuit configured to drive the switching device. The drive circuit may be configured to provide a drive signal to the switching device to alter a conductive state of the switching device to produce a first output signal at the first output node and a second output signal at the second output node. The first and second output signals may be substantially equal in magnitude but opposite in polarity relative to a reference voltage.
-
Citations
10 Claims
-
1. An apparatus, comprising:
-
a first coil having a planar spiral configuration with a spacing between turns of the first coil increasing from an outer edge of the first coil toward a center of the first coil; and a second coil having a planar spiral configuration with a spacing between turns of the second coil increasing from an outer edge of the second coil toward a center of the second coil, wherein the first coil and the second coil are configured to transfer wireless power via a magnetic field to one or more receive coils. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method, comprising:
-
driving with electrical current a first coil having a planar spiral configuration witha spacing between turns of the first coil increasing from an outer edge of the first coil toward a center of the first coil; and driving with electrical current a second coil having a planar spiral configuration with a spacing between turns of the second coil increasing from an outer edge of the second coil toward a center of the second coil, wherein the first coil and the second coil are configured to transfer wireless power via a magnetic field to one or more receive coils. - View Dependent Claims (7, 8, 9, 10)
-
Specification