Abstract: Devices, methods and graphical user interfaces for manipulating user interfaces based on fingerprint sensor inputs are provided. While a display of an electronic device with a fingerprint sensor displays a first user interface, the device may detect movement of a fingerprint on the fingerprint sensor. In accordance with a determination that the movement of the fingerprint is in a first direction, the device allows navigating through the first user interface, and in accordance with a determination that the movement of the fingerprint is in a second direction different from the first direction, the device allows displaying a second user interface different from the first user interface on the display.

Abstract: Techniques are described to determine that an electrical short has occurred on a communication channel based on monitoring a power level of the communication channel with respect to a reference power level. In an implementation, the aviation communication apparatus includes a first voltage source that provides a first voltage input to a first communication channel of a stereo jack for a headset, a voltage monitor that monitors a voltage level of the first communication channel with respect to a reference voltage level of the first communication channel and determines that an electrical short has occurred on the first communication channel based on the monitoring. Accordingly, an electrical short indicator may indicate responsive to the voltage monitor determining that the electrical short has occurred.

Abstract: Techniques are described to determine that an electrical short has occurred on a communication channel based on monitoring a power level of the communication channel with respect to a reference power level. In an implementation, the aviation communication apparatus includes a first voltage source that provides a first voltage input to a first communication channel of a stereo jack for a headset, a voltage monitor that monitors a voltage level of the first communication channel with respect to a reference voltage level of the first communication channel determines that an electrical short has occurred on the first communication channel based on the monitoring. Accordingly, an electrical short indicator may indicate responsive to the voltage monitor determining that the electrical short has occurred.

Abstract: An ultrasonic imaging system for harmonic imaging includes a receiver which demodulates ultrasonic echo signals received by a transducer array and filters a band of fundamental frequencies from the echo signals by means of a notch filter. Images responsive to the filtered signals are presented on a display system.

Abstract: A self-tuning crystal notch filter suitable for rejecting a carrier signal in a receiver channel of a receiver of an ultrasound imaging system. The crystal notch filter has a resonant frequency which is electronically tuned. Tuning is done under software control without operator intervention. The software instructs a channel other than the one being tuned to transmit into the transducer. The receive channel being tuned amplifies the received signal and then passes the amplified signal through the notch filter and the TGC amplifier to the corresponding digital signal processing (DSP) circuit via an analog-to-digital converter. The software reads the amplitude of the digital receive signal output from the DSP circuit. By programming a D/A converter incorporated in the notch filter, a value can be found that minimizes the amplitude of the signal output by the DSP circuit, i.e., maximizes the amount of carrier signal being rejected. This value is then used during subsequent imaging data acquisition.

Abstract: A method for increasing dynamic range of ultrasound imaging signals uses a barrel shifter. The barrel shifter shifts large bit two's complement input data into a standard size bit two's complement output. The method, then, comprises the steps of reducing a large data bus to a smaller data bus, and dynamically changing the amount of reduction. The bus reduction is achieved using a barrel shifter. Since time gain compensation (TGC), used to compensate for diminishing echo strength, increases with the depth of the signal, the amount of shift is directly related to the TGC value.

Abstract: A dynamic apodization gain correction technique for use with ultrasound imaging systems comprises an apodization curve generator and the ability to drive the curve generator to provide digital generation of the apodization gain correction curve. The ability to drive the curve generator comprises an initial plurality of active elements and data represented by a series of slopes and associated time-dependent break-points.

Abstract: A time gain compensation technique is applicable for use with ultrasound imaging systems, including systems having digital architecture. The time gain compensation apparatus of the present invention comprises a time gain compensation curve generator and the ability to drive the time gain compensation curve generator to provide digital generation of the time gain compensation curve. Digital generation of the time gain compensation curve is achieved by an initial gain and data represented by a series of slopes and associated time-dependent break-points.