Abstract:
A receiver includes a mixing module for mixing an input signal by at least one mixing sequence to produce a mixed signal. The mixed signal is filtered to produce a first filtered signal. A first downsampler downsamples the first filtered signal to produce a first decimated signal, wherein the decimation period is not a multiple of the mixing period.
Abstract:
A controlled sampling module samples an input signal from an input device and a reference signal. The controlled sampling module includes a plurality of sample capacitors, a switching network, and a switch control module for controlling the switching network. The switching network couples a first capacitor of the plurality of capacitors to the reference signal during a first phase, and to the input signal during a second phase, such that a charge on the first capacitor remaining at an end of the first phase is cancelled during the second phase.
Abstract:
A multi-mode driver circuit includes a first channel driver, a second channel driver, and a control module. The first channel driver module is operably coupled to drive a first channel signal to a first node of an output. The second channel driver module is operably coupled to drive a second channel signal to a second node of the output. The control module is operably coupled to provide a monotone signal as the first channel signal to the first channel driver module and an inversion of the monotone signal as the second channel signal to the second channel driver module when the multi-mode driver is in a first state. The control module is also operably coupled to provide a first stereo signal as the first channel signal to the first channel driver module and a second stereo signal as the second channel signal to the second channel driver module when the multi-mode driver is in a second state.
Abstract:
A semiconductor device includes an adjustable current source that is coupled to an external battery. The semiconductor device includes a feedback control module that is responsive to a voltage level at the external battery. The feedback control module also has an output that is directed to control the current supplied by the adjustable current source. Also, the feedback control module can selectively provide a signal to periodically and temporarily turn off the current supplied by the adjustable current source. A voltage at the external battery is measured during a time period when the current is turned on and during a time period when the current is turned off. While the current is turned off, the feedback control module can measure the external battery voltage so that it can be compared to the battery voltage while the adjustable current source is on.
Abstract:
A method of charging a battery includes applying a charging current from a semiconductor device to the battery during a first battery charging time period. The method also includes measuring a charging voltage level at the battery during the first battery charging time period. During a non-charging voltage measurement time interval, the method includes temporarily stopping application of the charging current from the semiconductor device to the battery and measuring a non-charging voltage level at the battery while the charging current is not being applied to the battery.
Abstract:
A method for reducing distortion caused by clipping of lower frequency audio signals begins by monitoring a volume setting of an audio signal with respect to a range of volume settings to produce a monitored volume setting. The method continues by establishing an equalization setting based on the monitored volume setting.
Abstract:
A battery converter, which is used to convert battery voltage to an output voltage to power an integrated circuit in a battery-operated mode, is placed into a battery-charge mode to charge the battery when external power source is present to power the integrated circuit and the battery needs charging.
Abstract:
Various embodiments of the present invention relate to systems, devices and methods of oversampling electronic components where high frequency oversampling clock signals are generated internally. The generated oversampling clock is automatically synchronous with the input clock and the input serial data in a serial data link, and is adaptive to predetermined parameters, such as bit depth and oversampling rate.
Abstract:
An amplifying circuit includes an input chopping circuit, an amplifier, and an output chopping circuit. The input chopping circuit is operably coupled to chop an input signal at a chopping rate to produce a chopped input signal. The amplifier has a first input transistor section, a second input transistor section, and a transistor load section. The first and second input transistor sections are operably coupled to receive the chopped input signal, wherein the first input transistor section amplifies the chopped input signal when the chopped input signal is in first signal level range, the second input transistor section amplifies the chopped input signal when the chopped input signal is in a second signal level range, and the first and second input transistor sections amplify the chopped input signal when the chopped input signal is in a third signal level range, wherein the transistor load section is coupled to the first and second input transistors sections to produce an amplified chopped signal. The output chopping circuit is operably coupled to chop the amplified chopped signal at the chopping rate to produce an amplified output signal.
Abstract:
A method for signal strength detection begins by comparing a signal strength representation of a signal with a signal strength representation of a reference signal. The method continues by adjusting, when the signal strength representation of the signal compares unfavorably with the signal strength representation of the reference signal, at least one of the signal strength representation of the signal and the signal strength representation of the reference signal until the signal strength representation of the signal compares favorably with the signal strength representation of the reference signal. The method continues by determining signal strength of the signal based on the adjusting of the signal strength representation of the signal and signal strength of the reference signal.