Circuit for reading buttons and controlling light emitting diodes
First Claim
Patent Images
1. An apparatus comprising:
- a first inverted diode pair having an anode-cathode orientation of a first diode opposite to that of the anode-cathode orientation of a second diode, the first inverted diode pair located between a first pin and a second pin;
a second inverted diode pair located between the second pin and a third pin; and
a third inverted diode pair located between the first pin and the third pin;
wherein the first inverted diode pair, the second inverted diode pair, and the third inverted diode pair are each separate from each other;
wherein the electrical states of the first pin, the second pin, and the third pin are configured to determine if current is passing through the first diode or the second diode of any of the first, the second or the third inverted diode pairs.
6 Assignments
0 Petitions
Accused Products
Abstract
A circuit including a first pin connection, a second pin connection, a first diode-switch arrangement and a second diode-switch arrangement. The first diode-switch arrangement is connected in series and configured to allow a current to pass from the second pin connection to the first pin connection. The second diode-switch arrangement is connected in series and configured to allow a current to pass from the first pin connection to the second pin connection. An energized state of the first and second diode-switch arrangements is determined according to a voltage detected on the first or second pin connection.
-
Citations
12 Claims
-
1. An apparatus comprising:
-
a first inverted diode pair having an anode-cathode orientation of a first diode opposite to that of the anode-cathode orientation of a second diode, the first inverted diode pair located between a first pin and a second pin; a second inverted diode pair located between the second pin and a third pin; and a third inverted diode pair located between the first pin and the third pin; wherein the first inverted diode pair, the second inverted diode pair, and the third inverted diode pair are each separate from each other; wherein the electrical states of the first pin, the second pin, and the third pin are configured to determine if current is passing through the first diode or the second diode of any of the first, the second or the third inverted diode pairs. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method comprising:
-
applying a low voltage state to a first pin, wherein a first inverted diode pair is coupled between the first pin and a second pin, the first inverted diode pair including an anode-cathode orientation of a first diode opposite to that of the anode-cathode orientation of a second diode; applying a high impedance state to a third pin, wherein a second inverted diode pair is coupled between the second pin and the third pin, wherein a third inverted diode pair is coupled between the third pin and the first pin, and wherein the first inverted diode pair, the second inverted diode pair, and the third inverted diode pair are each separate from each other; pulling the second pin to a high voltage state to control the flow of a current between the first pin and the second pin through the first inverted diode pair; and reading the voltage on the second pin to determine if the first diode or the second diode of the first inverted diode pair is passing the current. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification