Abstract: Apparatus and methods for a switch circuit to provide a substantially constant gate-to source voltage to a passgate are provided. In an example, a switch circuit includes a summing circuit having an output configured to couple to the gate of a passgate, the summing circuit can be configured to maintain a substantially constant voltage between the gate and the source of the pass gate.

Abstract: This document discusses, among other things, apparatus and methods for passing a signal in a power down state. An example switch device can include a first depletion-mode transistor configured to pass an analog signal between a first node and a second node in a first state and to isolate the first node from the second node in a second state, a control circuit coupled to a control node of the first depletion-mode transistor and configured to isolate the control node from a first supply input in the first state and to couple the control node to the first supply input in the second state, and a tracking circuit configured to couple the control node of the first depletion-mode transistor to the first node during the first state and to isolate the control node of the first depletion-mode transistor from the first node in the second state.

Abstract: Apparatus and methods for a switch circuit to provide a substantially constant gate-to source voltage to a passgate are provided. In an example, a switch circuit includes a summing circuit having an output configured to couple to the gate of a passgate, the summing circuit can be configured to maintain a substantially constant voltage between the gate and the source of the pass gate.

Abstract: This document discusses, among other things, apparatus and methods for passing a signal in a power down state. An example switch device can include a first depletion-mode transistor configured to pass an analog signal between a first node and a second node in a first state and to isolate the first node from the second node in a second state, a control circuit coupled to a control node of the first depletion-mode transistor and configured to isolate the control node from a first supply input in the first state and to couple the control node to the first supply input in the second state, and a tracking circuit configured to couple the control node of the first depletion-mode transistor to the first node during the first state and to isolate the control node of the first depletion-mode transistor from the first node in the second state.

Abstract: A system and method is provided for selectively presenting received messages to a user via a visual or audio interface while redacting potentially sensitive information or notification of messages containing sensitive information. When a message is received, the message content is compared to predefined criteria to determine whether it contains sensitive information. If the message contains sensitive information, its header information, which is normally presented in a message mailbox listing or in an audible notification, is redacted to remove some or all of the header content. The user may still review the entire message as received by the user's communication device without redaction.

Abstract: A lighted practice golf club for assisting in teaching a golfer to maintain the correct plane or line of travel for a golf club throughout the club swing. The club includes a special golf club a handle light positioned in a first end and a headlight positioned in a second end of the shaft of the golf club. A tubular passage extends through the shaft between the first and second ends. The shaft is comprised of an electrically conductive material and is electrically connected to a power source located in the shaft. One of the electrical terminals of the headlight is in electrical communication with the electrically conductive material of the shaft, and an electrical conducting wire extends through the tubular passage and is in electrical communication with the power source and the other of the electrical terminals of the headlight such that electrical power is supplied to the headlight by the electrical conducting wire and the shaft of the golf club.