A signal processing device includes an A-D converter and a controller. The A-D converter converts an analog signal to a digital signal in which portions where the amplitude exceeds a predetermined range are clipped. A counter of the controller calculates, for the digital signal, a number of clipped samples for each predetermined number of period samples. A frequency converter performs frequency conversion of the digital signal. An LPF removes high frequency components of the digital signal. A rate converter converts a sampling rate of the A-D converter. A digital amplifier amplifies and outputs the digital signal. An amplification factor adjuster multiplies a preset amplification factor of the digital amplifier by an amplification factor adjustment coefficient based on a ratio of the number of regular samples to the number of period samples, to adjust the amplification factor.

A signal processing device includes an A-D converter and a controller. The A-D converter converts an analog signal to a digital signal in which portions where the amplitude exceeds a predetermined range are clipped. A counter of the controller calculates, for the digital signal, a number of clipped samples for each predetermined number of period samples. A frequency converter performs frequency conversion of the digital signal. An LPF removes high frequency components of the digital signal. A rate converter converts a sampling rate of the A-D converter. A digital amplifier amplifies and outputs the digital signal. An amplification factor adjuster multiplies a preset amplification factor of the digital amplifier by an amplification factor adjustment coefficient based on a ratio of the number of regular samples to the number of period samples, to adjust the amplification factor.

A system for high voltage protection may comprise a high voltage protection module electrically connected to a transmitter module and a receiver module and a muting module connected to the high voltage protection module and the receiver module. A method for high voltage protection may comprise disposing a downhole tool into a wellbore, transmitting an excitation signal from the transmitter module to transceiver as a high voltage pulse signal to the high voltage protection module, reducing the high voltage pulse signal with the high voltage protection module, and preventing saturation of the receiver with a low impedance interface from the muting module.

An audio interface system is disclosed that receives an audio signal from an audio line and outputs a normalised audio signal. An audio interface device of the audio interface system comprises a signal conditioning module, a gain module to apply a gain to the audio signal and an attenuation module to apply an attenuation to the audio signal to output the normalised audio signal. The audio interface device further comprises an interface configured to communicate the normalised signal to an external device. In response to determining that an amplitude of the audio signal does not meet a minimum amplitude requirement or exceed a maximum amplitude requirement, the signal conditioning module is to adjust the amplitude of the audio signal by applying the gain and/or attenuation to meet the requirement.

The present technology relates to a signal processing device, a signal processing method, and a program for enabling reproduction of high-quality sounds with a low process load. The signal processing device includes a demultiplexing section that extracts encoded audio signals and overamplitude flags, which have been generated for a plurality of respective panel loudspeakers and each indicate whether overamplitude will occur in the corresponding panel loudspeaker, by demultiplexing encoded data, a decoding section that decodes the encoded audio signals, and an adjustment section that adjusts audio signals to be supplied to the plurality of panel loudspeakers on the basis of the overamplitude flags and audio signals resulting from the decoding. The present technology is applicable to an encoding device and a decoding device.

One imaging apparatus includes a first amplifier circuit, a second amplifier circuit, and a limiter circuit that limits the output of the first amplifier circuit, and further includes a configuration to clamp the output of the limiter circuit. Moreover, another imaging apparatus includes a fully differential amplifier circuit that outputs an amplified noise signal amplified from a noise signal, and an amplified optical signal amplified from an optical signal, and an output limiting circuit that limits each of the amplitude range of the amplified noise signal and the amplitude range the amplified optical signal.

This radiofrequency power limiter includes at least one transistor, a drain of the transistor being directly connected to a mesh connecting an input to an output of the limiter, a source of the transistor being connected to a common reference potential, and a gate of the transistor being connected to a common control potential. The transistor is not biased between its drain and its source during operation of the limiter.

A system for suppressing signal harmonic distortion caused by a main signal processing device provides processing for an electrical signal containing sine components of multiple frequencies. A post-processor reduces the amplitude of each frequency, relative to other frequencies, as the frequency increases, thus suppressing harmonics, which have higher frequencies than their respective elementary signals. To compensate for frequency distortion caused by the differential frequency suppression in the post-processing stage, a pre-processor provided upstream of the main signal processing device provides frequency-dependent signal processing having a generally opposite effect to that of the post-processor, increasing the amplitude of each frequency of the signal passing through the pre-processor, relative to other frequencies, as the frequency increases. The resulting output signal thus has substantially the same frequency spectrum as the original signal while distortion-causing harmonics are reduced or eliminated.

One imaging apparatus includes a first amplifier circuit, a second amplifier circuit, and a limiter circuit that limits the output of the first amplifier circuit, and further includes a configuration to clamp the output of the limiter circuit. Moreover, another imaging apparatus includes a fully differential amplifier circuit that outputs an amplified noise signal amplified from a noise signal, and an amplified optical signal amplified from an optical signal, and an output limiting circuit that limits each of the amplitude range of the amplified noise signal and the amplitude range the amplified optical signal.

A system for high voltage protection may comprise a high voltage protection module electrically connected to a transmitter module and a receiver module and a muting module connected to the high voltage protection module and the receiver module. A method for high voltage protection may comprise disposing a downhole tool into a wellbore, transmitting an excitation signal from the transmitter module to transceiver as a high voltage pulse signal to the high voltage protection module, reducing the high voltage pulse signal with the high voltage protection module, and preventing saturation of the receiver with a low impedance interface from the muting module.