Abstract: A terminal includes: a metal housing; a frame surrounds the metal housing; and a metal antenna radiator arranged between the metal housing and the frame, surrounding the metal housing, and having a first end coupled with a feed source through a matching circuit and a second end grounded.

Abstract: A reference-less frequency detector circuit includes a sampling circuit that is configured to generate a frequency control voltage and a switch circuit control signal based on a frequency difference between a clock signal frequency and an input data rate. The frequency control voltage has a frequency down indication and a frequency up indication. A voltage-to-current converter circuit is coupled to the sampling circuit and is configured to convert the frequency control voltage to a frequency control current based on the switch circuit control signal. The voltage-to-current converter circuit includes an output switch circuit controlled by the switch control signal and is configured to have substantially equal respective latencies for the frequency down indication and the frequency up indication.

Abstract: A housing assembly for a terminal and a terminal are provided. The housing assembly includes a housing, an antenna radiator and a ferrite. The antenna radiator is positioned at an outer face of the housing, and has a first orthographic projection region on the outer face. The ferrite is arranged on an inner face of the housing, and has a second orthographic projection region on the outer face. The first orthographic projection region is located in the second orthographic projection region.

Abstract: The present disclosure provides a conductive cover, a housing assembly and a terminal. The conductive cover includes a first portion, a second portion, a conductive suspended strip and a conductive connecting member. A slot is defined between the second portion and the first portion. The conductive suspended strip is located in the slot and has a length equal to a length of the slot. An insulating layer is provided between the conductive suspended strip and the first portion, and another insulating layer is provided between the conductive suspended strip and the second portion. The conductive connecting member bridges over the slot, is electrically connected with the first portion and the second portion, and is insulated from the conductive suspended strip.

Abstract: The present disclosure provides an antenna device including: a peripheral frame made of a signal shielding material and provided with at least two micro seam bands which partition the peripheral frame into at least two frame bodies, the frame bodies including a first antenna, the micro seam band having at least one micro seam; a first matching circuit electrically coupled to the first antenna; and a first radio-frequency receiving and emitting circuit electrically coupled to the first matching circuit. The frame bodies further includes a second antenna including a second matching circuit and a second radio-frequency receiving and emitting circuit, the second matching circuit is electrically coupled between the second antenna and the second radio-frequency receiving and emitting circuit, and the two radio-frequency receiving and emitting circuits deal with different radio-frequency signals. The micro seam band further includes a frame strip. The present disclosure further provides a mobile terminal.

Abstract: The present disclosure provides a metal housing; the metal housing includes a first edge and a second edge arranged opposite to each other, and a third edge and a fourth edge arranged opposite to each other. The third edge and the fourth edge are connected between the first edge and the second edge. A partitioning seam is provided in the metal housing so that at least one radiating part is formed in the metal housing. In the antenna device provided by embodiments of the present disclosure, the metal housing is enabled to be a radiator through a combination of the partitioning seam and a radiating circuit. The present disclosure further provides an antenna device and a mobile terminal.

Abstract: An optical data circuit includes threshold adjustment circuits to perform threshold adjustment compensation of asymmetrical optical noise. The optical data circuit includes an optical-to-electrical conversion circuit configured to produce first and second differential electrical data signals, at respective first and second electrical nodes, in response to an optical data signal. First and second digital-to-analog converter (DAC) circuits are each respectively coupled to the first and second electrical nodes and configured to respectively generate first and second adjustment signals. The first and second DAC circuits are configured to adjust the first and second differential electrical data signals such that a zero-crossing point of positive data is pulled up in response to the first adjustment signal and a zero-crossing point of negative data is pulled down in response to the second adjustment signal.

Abstract: A metal rear cover for a terminal and a terminal are provided. The metal rear cover includes a base plate provided with at least one micro-seam band, and the micro-seam band includes a plurality of micro-seams. The plurality of micro-seams are arranged equidistantly, a distance between two adjacent micro-seams is larger than a width of the micro-seam, the at least one micro-seam band divides the base plate into at least two radiation parts including a first radiation part and a second radiation part. A conducting switch is coupled between the first radiation part and the second radiation part, and configured to disconnect or connect the first radiation part with the second radiation part, so that transceiving of different preset frequency ranges can be achieved by the metal rear cover, when the conducting switch disconnects or connects the first radiation part with the second radiation part.

Abstract: A reference-less frequency detector circuit includes a sampling circuit that is configured to generate a frequency control voltage and a switch circuit control signal based on a frequency difference between a clock signal frequency and an input data rate. The frequency control voltage has a frequency down indication and a frequency up indication. A voltage-to-current converter circuit is coupled to the sampling circuit and is configured to convert the frequency control voltage to a frequency control current based on the switch circuit control signal. The voltage-to-current converter circuit includes an output switch circuit controlled by the switch control signal and is configured to have substantially equal respective latencies for the frequency down indication and the frequency up indication.

Abstract: A multiplexer comprises: an output circuit comprising a multiplexer output; and a first buffer coupled to the output circuit and comprising: a first selection input configured to receive a first selection signal; a first logical input configured to receive a first logical input signal; and a first ground; wherein the multiplexer is configured to: couple the first logical input to the multiplexer output when the first selection signal is a first value; and couple the first logical input to the first ground when the first selection signal is a second value. A method comprises: receiving a selection signal and a first logical input signal; coupling a first logical input to a multiplexer output when the selection signal is a first value; and coupling the first logical input to a ground when the selection signal is a second value.

Abstract: An apparatus comprising an input port configured to receive an input signal propagated through a transmission link, wherein the transmission link comprises a low-frequency channel loss and a high-frequency channel loss, a continuous-time linear equalization (CTLE) circuit coupled to the input port and configured to produce an output signal according to the input signal by applying a first gain to the input signal at a first frequency to compensate the low-frequency loss, and applying a second gain to the input signal at a second frequency to compensate the high-frequency channel loss, and an output port coupled to the CTLE circuit and configured to output the output signal.

Abstract: A reference-less frequency detector circuit includes a sampling circuit that is configured to generate a frequency control voltage and a switch circuit control signal based on a frequency difference between a clock signal frequency and an input data rate. The frequency control voltage has a frequency down indication and a frequency up indication. A voltage-to-current converter circuit is coupled to the sampling circuit and is configured to convert the frequency control voltage to a frequency control current based on the switch circuit control signal. The voltage-to-current converter circuit includes an output switch circuit controlled by the switch control signal and is configured to have substantially equal respective latencies for the frequency down indication and the frequency up indication.

Abstract: An optical data circuit includes threshold adjustment circuits to perform threshold adjustment compensation of asymmetrical optical noise. The optical data circuit includes an optical-to-electrical conversion circuit configured to produce first and second differential electrical data signals, at respective first and second electrical nodes, in response to an optical data signal. First and second digital-to-analog converter (DAC) circuits are each respectively coupled to the first and second electrical nodes and configured to respectively generate first and second adjustment signals. The first and second DAC circuits are configured to adjust the first and second differential electrical data signals such that a zero-crossing point of positive data is pulled up in response to the first adjustment signal and a zero-crossing point of negative data is pulled down in response to the second adjustment signal.

Abstract: The present disclosure provides an electronic device including a metal housing and at least one switch. The metal housing includes a peripheral frame provided with at least one micro seam band, the peripheral frame is partitioned by the at least one micro seam band to form at least one frame body, the micro seam band is formed by at least two micro seams, and a metal strip is provided between two adjacent micro seams. The switch includes a first end and a second end, the first end is electrically coupled to the frame body, and the second end is electrically coupled to the metal strip. The at least one frame body is an independent antenna. The switch includes a plurality of second ends coupled to different metal strips correspondingly, and a variety of low-frequency bandwidths of the antenna is expanded through different closed or open states of the switch.

Abstract: A metal rear cover for a terminal and a terminal are provided. The metal rear cover includes a base plate provided with at least one micro-seam band, and the micro-seam band includes a plurality of micro-seams. The plurality of micro-seams are arranged equidistantly, a distance between two adjacent micro-seams is larger than a width of the micro-seam, the at least one micro-seam band divides the base plate into at least two radiation parts including a first radiation part and a second radiation part. A conducting switch is coupled between the first radiation part and the second radiation part, and configured to disconnect or connect the first radiation part with the second radiation part, so that transceiving of different preset frequency ranges can be achieved by the metal rear cover, when the conducting switch disconnects or connects the first radiation part with the second radiation part.

Abstract: The present disclosure provides an antenna device including: a peripheral frame made of a signal shielding material and provided with at least two micro seam bands which partition the peripheral frame into at least two frame bodies, the frame bodies including a first antenna, the micro seam band having at least one micro seam; a first matching circuit electrically coupled to the first antenna; and a first radio-frequency receiving and emitting circuit electrically coupled to the first matching circuit. The frame bodies further includes a second antenna including a second matching circuit and a second radio-frequency receiving and emitting circuit, the second matching circuit is electrically coupled between the second antenna and the second radio-frequency receiving and emitting circuit, and the two radio-frequency receiving and emitting circuits deal with different radio-frequency signals. The micro seam band further includes a frame strip. The present disclosure further provides a mobile terminal.

Abstract: The present disclosure provides an electronic device including a metal housing and at least one switch. The metal housing includes a peripheral frame provided with at least one micro seam band, the peripheral frame is partitioned by the at least one micro seam band to form at least one frame body, the micro seam band is formed by at least two micro seams, and a metal strip is provided between two adjacent micro seams. The switch includes a first end and a second end, the first end is electrically coupled to the frame body, and the second end is electrically coupled to the metal strip. The at least one frame body is an independent antenna. The switch includes a plurality of second ends coupled to different metal strips correspondingly, and a variety of low-frequency bandwidths of the antenna is expanded through different closed or open states of the switch.

Abstract: The present disclosure provides a metal housing; the metal housing includes a first edge and a second edge arranged opposite to each other, and a third edge and a fourth edge arranged opposite to each other. The third edge and the fourth edge are connected between the first edge and the second edge. A partitioning seam is provided in the metal housing so that at least one radiating part is formed in the metal housing. In the antenna device provided by embodiments of the present disclosure, the metal housing is enabled to be a radiator through a combination of the partitioning seam and a radiating circuit. The present disclosure further provides an antenna device and a mobile terminal.

Abstract: A metal rear cover for the terminal (100) and a terminal are provided. The metal rear cover for the terminal (100) includes a base plate (10) provided with at least one micro-seam band (20), the micro-seam band (20) is provided with a plurality of micro-seams (21), and the at least one micro-seam band (20) divides the base plate (10) into at least two radiation parts (30). At least one of the at least two radiation parts (30) is configured to be coupled to a matching circuit (1) and to receive a feeding signal via the matching circuit (1).

Abstract: An optical data circuit includes threshold adjustment circuits to perform threshold adjustment compensation of asymmetrical optical noise. The optical data circuit includes an optical-to-electrical conversion circuit configured to produce first and second differential electrical data signals, at respective first and second electrical nodes, in response to an optical data signal. First and second digital-to-analog converter (DAC) circuits are each respectively coupled to the first and second electrical nodes and configured to respectively generate first and second adjustment signals. The first and second DAC circuits are configured to adjust the first and second differential electrical data signals such that a zero-crossing point of positive data is pulled up in response to the first adjustment signal and a zero-crossing point of negative data is pulled down in response to the second adjustment signal.