Abstract: A battery-disconnect circuit may include a latch, a battery-disconnect subcircuit, and a power-enable subcircuit. The battery-disconnect subcircuit may be configured to control current leakage. The battery-disconnect subcircuit may be connected to the latch. The latch may be configured to maintain a power supply state of the battery-disconnect subcircuit, a no-power supply state of the battery-disconnect subcircuit, or both. The power-enable subcircuit may be connected to the battery-disconnect subcircuit. The power-enable subcircuit may be configured to switch the battery-disconnect subcircuit to the power supply state based on an enable signal. The power-enable subcircuit may be configured to switch the battery-disconnect subcircuit to the no-power supply state based on an off signal.

Abstract: Devices and methods for sharing power between power sources are disclosed. The power sources may be internal to an electronic device, external to the electronic device, or both. An electronic device may include a power source, a switch circuit, a processor, and a power management integrated circuit (PMIC). The processor may determine a load current estimate. The load current estimate may be based on a device setting, an external temperature, or both. The processor may determine a power source voltage, an external power source voltage, or both. The processor may determine a power source current, an external power source current, or both. The PMIC may set an output power source current of the power source. The PMIC may set an output external power source current of the external power source.

Abstract: A battery-disconnect circuit may include a latch, a battery-disconnect subcircuit, and a power-enable subcircuit. The battery-disconnect subcircuit may be configured to control current leakage. The battery-disconnect subcircuit may be connected to the latch. The latch may be configured to maintain a power supply state of the battery-disconnect subcircuit, a no-power supply state of the battery-disconnect subcircuit, or both. The power-enable subcircuit may be connected to the battery-disconnect subcircuit. The power-enable subcircuit may be configured to switch the battery-disconnect subcircuit to the power supply state based on an enable signal. The power-enable subcircuit may be configured to switch the battery-disconnect subcircuit to the no-power supply state based on an off signal.

Abstract: A method and apparatus may be used for power source time division multiplex for thermal management and extended operation. The apparatus includes a primary power source, a secondary power source, and a processor. The processor obtains an internal temperature measurement of the image capture device. The processor may determine a thermal zone based on the internal temperature measurement. In an example where the determined thermal zone is a first thermal zone, the processor may be configured to draw power from the secondary power source. In an example where the determined thermal zone is a second thermal zone, the processor may be configured to alternately draw power from the primary power source and the secondary power source. In an example where the determined thermal zone is a third thermal zone, the processor may be configured to draw power from the secondary power source.

Abstract: Devices and methods for sharing power between power sources are disclosed. The power sources may be internal to an electronic device, external to the electronic device, or both. An electronic device may include a power source, a switch circuit, a processor, and a power management integrated circuit (PMIC). The processor may determine a load current estimate. The load current estimate may be based on a device setting, an external temperature, or both. The processor may determine a power source voltage, an external power source voltage, or both. The processor may determine a power source current, an external power source current, or both. The PMIC may set an output power source current of the power source. The PMIC may set an output external power source current of the external power source.

Abstract: A battery-disconnect circuit may include a latch, a battery-disconnect subcircuit, and a power-enable subcircuit. The battery-disconnect subcircuit may be configured to control current leakage. The battery-disconnect subcircuit may be connected to the latch. The latch may be configured to maintain a power supply state of the battery-disconnect subcircuit, a no-power supply state of the battery-disconnect subcircuit, or both. The power-enable subcircuit may be connected to the battery-disconnect subcircuit. The power-enable subcircuit may be configured to switch the battery-disconnect subcircuit to the power supply state based on an enable signal. The power-enable subcircuit may be configured to switch the battery-disconnect subcircuit to the no-power supply state based on an off signal.

Abstract: A communication device (140) for receiving and decoding a codeword of predetermined length, wherein the codeword includes information and parity bits, comprises a memory (315) for storing the codeword in the form of segments, wherein each segment comprises multiple bits forming bit combinations. A first look-up table (326, 327, 328, 329) included in the communication device (140) stores parity vectors corresponding to the bit combinations, and a second look-up table (325) stores values corresponding to syndrome vectors. A processing unit (310) coupled to the memory (315) and the first and second look-up tables (325-329) uses the bit combinations of the segments as indices into the first look-up table (326-329) to locate corresponding parity vectors, adds the corresponding parity vectors using modulo 2 arithmetic to form a resulting syndrome, and uses the resulting syndrome as an index into the second look-up table (325) to locate an erroneous bit included in the codeword.

Abstract: In a transmitter (100), circuitry is employed to automatically calibrate errors in a modulated carrier signal. A generator (320) is activated to generate (510) a low frequency square wave for use as data, which is used to generate a modulating signal from which the modulated carrier signal is generated. The modulated carrier signal is down-converted to an intermediate frequency (IF) signal having a steady state IF signal level. The instantaneous IF signal level is compared (545) to the steady state IF signal level to determine (550) whether the instantaneous IF signal level differs from the steady state IF signal level by greater than a predetermined amount, and, when the instantaneous IF signal level differs from the steady state IF signal level by greater than the predetermined amount, the modulating signal is adjusted (560).

Abstract: A simulcast transmission system (100) utilizes adaptive demodulation to provide a method and apparatus for automatic delay equalization measurements. The simulcast transmission system (100) comprises a control station (101), and a plurality of remote transmission stations (201, 301) capable of re-transmitting a received delay equalization measurement signal which includes at least a correction bit pattern signal followed by a synchronization pattern signal.

Abstract: This invention provides an improved method for synchronizing a slave oscillator with a master oscillator. The slave includes two counters designated Reference and System, driven by its oscillator; the master includes a System Counter driven by its oscillator. The master sends a reset signal to the slave, simultaneously resetting its System Counter. Periodically, the master sends to the slave a synchronization signal, which signal is generated at predetermined intervals based upon the master's System Counter. Upon receipt of the reset signal, the slave resets its counters. Later, upon receipt of the synchronization pulse, the slave modifies the value of its System counter based upon the closest multiple of the expected count value for the synchronization signal interval. The Reference Counter is not synchronized and runs free.