Methods and systems are provided for detecting artifacts in an electronic signal. In an embodiment, a method is provided comprising: connecting a first input of an electronic device to a first signal line of a signal processing device, such as an amplification device; connecting a second input of the electronic device to a second signal line of the signal processing device, the second signal line being downstream from the first signal line; establishing, based on an observed behavior of a first signal on the first signal line, an expected behavior of a second signal on the second signal line; and determining whether a difference exists between the expected behavior of the second signal and an observed behavior of the second signal. If a difference is detected, the expected behavior of a second signal and the observed behavior of the second signal may be recorded for later analysis.

A remote control device testing environment evaluates operational performance of physical implementations of remote control devices. This operational performance of the physical implementations of the remote control devices allows the integrated circuits of the remote control devices as well as integrated circuit interfaces electrically coupling these integrated circuits to each other to be evaluated. Additionally, the interconnection, such as electrical coupling to provide an example, between these integrated circuits and/or the integrated circuit interfaces can be evaluated which otherwise would not be evaluated by software simulation alone. Moreover, the evaluating of this operational performance of the physical implementations of the remote control devices allows these remote control devices to be in evaluated in a real world environment with exposure to various environmental factors, such as temperature, humidity, and/or electromagnetic interference to provide some examples. Furthermore, the evaluating of this operational performance of the physical implementations of the remote control devices allows interactions between these remote control devices and other electronic devices to be evaluated.

There is provided fiber-coaxial amplifier device (10) comprising at least one output (14) and a test point (26) associated with the at least one output (14), wherein alternative first and second electrical paths (36, 38) are connectable to the at least one output (14), the first path (36) connectable to the at least one output (14) whilst bypassing the test point, the second path (38) connectable to both the at least one output (14) and the test point (26), and a relay (30) operable to connect one of the first path or the second path to the at least one output (14). The fiber-coaxial amplifier device (10) is configured for signals complying with Extended Spectrum DOCSIS.

A test card and a test display adapter are disclosed. The test card includes an assembling plate and an electrical heat source. The electrical heat source is provided on the assembling plate. The electrical heat source includes a first heat transfer plate, a second heat transfer plate and at least one heat source element. The first heat transfer plate is stacked on the assembling plate, and the second heat transfer plate is laminated over the first heat transfer plate, with the heat source element being sandwiched between the first and second heat transfer plates. The test card and the test display adapter have a wide variety of advantages including very low cost, easy material availability, a short wait time, easy manufacturability, a long service life, easy modifiability and good interoperability.

An audio system includes an H-bridge. The audio system implements one or more techniques for ensuring a transistor within the H-bridge does not turn on in the event of the detection of a short-circuit on the output of the H-bridge. Other transistors within the H-bridge can turn and thus audio can still be played to a speaker.

Circuitry for detecting a capacitive load coupled between a first node and a second node, the circuitry comprising: drive circuitry for applying a first voltage to a first node over a first time period; processing circuitry configured to: measure a second voltage at the first node; and determine that the load is a capacitive load based on the second voltage.

An apparatus for testing a transducer module includes a test signal generator coupled to a common-mode terminal common to a plurality of transducers, and a signal processing circuit configured to receive output signal from each of said transducers and to produce an output signal. If the transducers are well matched to one another, the output signal will have little or no output amplitude. If there is a mismatch between the transducers, however, the output signal will have an amplitude proportional to the mismatch. The amplitude of the output signal may be compared to a predetermined threshold in order to produce a mismatch output signal indicating the existence of, and/or the degree of, mismatch between the transducers.

Provided are a method and device for identifying an individual appliance through analysis of a harmonic component of a power signal. An operating appliance identification method includes collecting a mixed load signal from a home power distribution network, generating a first candidate appliance list by selecting first candidate appliances among individual appliances registered in an individual appliance harmonic analysis information table based on a ratio of a harmonic component value included in the mixed load signal, generating a second candidate appliance list including second candidate appliances by filtering the first candidate appliances based on a magnitude of the harmonic component value included in the mixed load signal, and identifying an operating appliance among a plurality of appliances connected to the home power distribution network by using the second candidate appliance list.

An energy meter is configured to determine component waveforms that form a measured waveform. The meter inputs the waveform into one or more entries of a data structure, each entry of the one or more entries of the data structure storing a weight value that is determined based at least in part on values of the data signatures representing the plurality of remote devices, each entry being connected to one or more other entries of the data structure. The meter, for each of the one or more entries, generates an output value by performing an arithmetic operation on the waveform stored at that entry, the arithmetic operation comprising a function of the weight value. The meter identifies, from among the data signatures, one or more particular data signatures that are represented in the waveform. The meter determines, based on the particular data signatures, an operational state of another device.

The present disclosure relates to circuitry for driving a load. The circuitry comprises: primary driver circuitry coupled to a primary signal path and operable to drive the load with a playback signal in a first mode of operation of the circuitry, wherein a playback signal comprises a signal that drives the load to generate a desired output; auxiliary driver circuitry coupled to an auxiliary signal path; an auxiliary current sense resistor in the auxiliary signal path; and current detection circuitry coupled to the auxiliary current sense resistor and configured to generate a signal indicative of a current through the load. One of the primary driver circuitry and the auxiliary driver circuitry is operable to drive the load with a pilot signal in a second mode of operation of the circuitry, wherein a pilot signal comprises a signal having a predefined frequency or frequency content and a predefined magnitude.