Front-end circuitry is difficult to design for high sample rate, wide bandwidth receivers with high performance requirements on noise and linearity. One exemplary front-end circuitry is integrated on-chip with the RF ADC in a receiver, and the circuitry implements ESD protection, attenuation, and gain. The circuitry includes a multi-tap filter with LC circuits, and the filter implements a highly linear filter. Advantageously, the capacitors in the LC circuits are also used for ESD protection. Additionally, tunable attenuator cells are implemented across the multi-tap filter to provide a wide range of variable attenuation. The circuitry can further include a fixed or variable gain stage at the output. The resulting circuitry offers variable gain and attenuation while meeting bandwidth, noise, and linearity requirements.

A PA module includes: a multilayer substrate having a ground pattern layer connected to a ground of a power source; amplifier transistors disposed on the multilayer substrate; a bypass capacitor having one end connected to the collector of the amplifier transistor; a first wiring line connecting the emitter of the amplifier transistor and the ground pattern layer to each other; a second wiring line connecting the emitter of the amplifier transistor and the ground pattern layer to each other; a third wiring line connecting the other end of the bypass capacitor and the ground pattern layer to each other; and a fourth wiring line formed between the amplifier transistor and the ground pattern layer and between the bypass capacitor and the ground pattern layer and connecting the first wiring line and the third wiring line to each other.

An oscillating element includes a substrate, negative resistance elements which are electrically connected to the substrate, antennas which are electrically connected one-to-one to each negative resistance element and which transmit or receive an electromagnetic wave, a pad electrically connected to a power supply source for supplying power to the antennas, and a conductor which electrically connects the pad and the antennas to each other. The conductor is constituted of a common wiring that is common to the antennas and individual wirings from the common wiring to each antenna. The individual wirings differ from each other with respect to a sectional area, resistivity, and a length in accordance with a position on the substrate of an antenna connected to each wiring to reduce a difference in wiring resistances caused based on a distance between the antenna connected to each wiring and the pad.

An integrated communication power system supplies power to a communication equipment, and the communication equipment includes a base station module and an antenna processing module. The integrated communication power system includes a first transfer switch, a first integrated conversion module, a DC conversion module, and an energy storage module. The first transfer switch selectively switches one of input sources and a renewable energy to be coupled to the first integrated conversion module to receive an input voltage. The first integrated conversion module converts the input voltage into a DC voltage, and the DC conversion module provides an output voltage to supply power to the antenna processing module according to the DC voltage. The energy storage module receives an energy storage voltage provided by the first integrated conversion module or the DC conversion module to supply power to the base station module.

An electronic device may include wireless circuitry with a processor, a transceiver, an antenna, and a front-end module coupled between the transceiver and the antenna. The front-end module may include one or more power amplifiers for amplifying a signal for transmission through the antenna. A power amplifier may include a phase distortion compensation circuit. The phase distortion compensation circuit may include one or more n-type metal-oxide-semiconductor capacitors configured to receive a bias voltage. The bias voltage may be set to provide the proper amount of phase distortion compensation.

A radio frequency switch has an antenna end, a first signal end for transmitting a first radio frequency signal, a second signal end for transmitting a second radio frequency signal, a third signal end for transmitting a third radio frequency signal, a first series path having a first switch, a second series path having a second switch, a third series path having a third switch, a first shunt path coupled between the first signal end and a node, a second shunt path coupled between the second signal end and the node, a common path coupled between the node and a first reference voltage end, and a third shunt path coupled between the third signal end and a second reference voltage end. The first series path and the second series path are connected to a common ground pad via the common path.

The present disclosure may provide a radio frequency transmission device. The radio frequency transmission device may include: a radio frequency power amplifier (RFPA) configured to produce a radio frequency signal; and a transmitter coil status selection module configured to transmit the radio frequency signal to at least one of a plurality of radio frequency coils. The RFPA and the transmitter coil status selection module may be housed in a device chamber.

A signal adjusting circuit and a receiving end circuit using the same are provided. The signal adjusting circuit is adapted to a peak detector, and includes a first amplifier and a first feedback circuit. The first amplifier receives a first input signal, and amplifies the first input signal to output a first output signal. The first feedback circuit is connected between a first input terminal and a first output terminal of the first amplifier, and is configured to determine a first gain of the first output signal. The peak detector is connected to a first output node of the first feedback circuit, so as to receive a first detection signal and detect a peak value of the first detection signal. The peak detector has a predetermined power input range, and the first feedback circuit keeps the first detection signal within the predetermined power input range.

Disclosed is an interactive device for an internet radio station, comprising a content presentation unit and a content selection unit. The content selection unit includes a knob, a selection module, a processing module, an indication module and a communication module. The knob inputs by a user, a channel selection instruction by means of manual rotation; the selection module generates a corresponding electrical signal according to the channel selection instruction; the processing module obtains, according to the electrical signal, a corresponding audio resource from the network radio station and releases the audio resource to the content presentation unit which plays the audio resource. The indication module generates, under the driving of the knob, a state change corresponding to the channel selection instruction. In this way, the user can select the audio resource by rotating the knob, so that the channel selection manner is similar to the traditional radio rotary tuning method.

According to one embodiment, a semiconductor integrated circuit includes first and second power supply lines, first and second nodes, and first and second circuits. The first circuit is configured to supply a first current to the second power supply line, from the first node or the second node. The second circuit is configured to supply a second current from the first power supply line to the first node based on a magnitude of the first current, and to supply a third current from the first power supply line to the second node based on the magnitude of the first current.