75results about "Two-way amplifiers" patented technology

Disclosed is an input/output circuit having a terminating circuit that contributes to a smaller chip area. The input/output includes an output buffer having a first series circuit, which comprises a first transistor and a resistor and a second series circuit, which comprises a second transistor and a resistor, connected in parallel between a high-potential power supply and an input/output pin, as well as a third series circuit, which comprises a third transistor and a resistor and a fourth series circuit, which comprises a fourth transistor and a resistor, connected in parallel between the input/output pin and a low-potential power supply. The input/output circuit further includes an input buffer having an input terminal connected to the input/output pin, and a control circuit which, at the time of a signal output, performs control for supplying a signal, which is obtained by inverting the logic of output data, to gates of the first to fourth transistors, and which, at the time of a signal input, performs control for supplying the gates of the first and third transistors with the high-potential power supply voltage and low-potential power supply voltage, respectively, and the gates of the second and fourth transistors with the low-potential power supply voltage and high-potential power supply voltage, respectively.

A bi-directional amplifier (10) for a transceiver module for amplifying both transmit signals and receive signals propagating in opposite directions. The amplifier (10) includes first and second common gate FETs (22, 24) electrically coupled along a common transmission line (20). A first variable matching network (28) is electrically coupled to the transmission line (20) between a transmit signal input port (12) and the first FET (22), and a second variable matching network (30) is electrically coupled to the transmission line (20) between a receive signal input port (14) and the second FET (24). An interstage variable matching network (32) is electrically coupled to the transmission line (20) between the first and second FETs (22, 24). A DC voltage regulator (34) provides a DC bias signal to the matching networks (28, 30, 32) and the FETs (22, 24) so that different signal amplifications and different impedance matching characteristics can be provided for the transmit signal and the receive signal.

A wireless radio frequency transceiver system for Internet of Things includes: a wireless radio frequency transmission module and a wireless radio frequency receiving module. The wireless radio frequency transmission module is used to shape signal waveform of digital signals from the Internet of Things to modulate the digital signals to form modulated output signals, and adopt a self-mixing technique to increase voltage/current amplitude of the modulated output signals and reduce phase noise. The wireless radio frequency transmission module is further used to adopt a current reuse technique to amplify the voltage/current amplitude of the modulated output signals, and transmit the amplified modulated output signals through a first antenna to a wireless channel. The wireless radio frequency receiving module is used to detect carrier input signals received from a second antenna to obtain baseband signals and demodulate the baseband signals to form differential signals. The wireless radio frequency receiving module is further used to amplify voltage/current amplitude of the demodulated differential signals several times in an open loop state to produce digital output signals, and transmit the digital output signals to a back-end signal processor.

An amplifier device for amplifying RF communication signals compatible with IEEE 802.11 standards. An amplifier circuit is housed within a cylindrical metal housing that provides excellent heat dissipation and requires no mounting hardware for installing the device within a communication system. The metal housing with an integrated lightning arrestor creates a watertight seal to protect the amplifier circuit from damage when installed outdoors and the amplifier circuit is compatible with both 2.4 GHz and 5.8 GHz frequency applications.

Multi-way amplifiers having impedance inverters connected to outputs of one or more peaking amplifiers are described. The output of the main amplifier may connect directly to a combining node and output impedance matching network. The multi-way amplifier configuration can improve efficiency at power back-off and improve RF bandwidth.

The invention provides a two-way dynamic amplification method used for a time division duplex system and a two-way dynamic amplification device thereof. The two-way dynamic amplification method comprises the following steps: a working state control device detects the radio-frequency signals of the user-side direction and the local-side direction, compares the radio-frequency signals with the preset start-up detection threshold and/or the preset shut-down detection threshold, and outputs the logic control signal to control a two-way dynamic amplification device, so as to enable the two-way dynamic amplification device in one of the working states. The working states of the two-way dynamic amplification device include an idle state, a downlink branch amplification state and an uplink branch amplification state. In the idle state, both the uplink branch and the downlink branch don't provide the radio-frequency signal amplification function. In the downlink branch amplification state, only the downlink branch provides the radio-frequency signal amplification function. In the uplink branch amplification state, only the uplink branch provides the radio-frequency signal amplification function. The two-way dynamic amplification method can dynamically acquire the transmission/reception synchronization and achieve the effect of two-way dynamic amplification.

A signal input port of a reverse amplifier is provided by an FIC connector, for direct connection to an F-port output of a forward amplifier, thereby eliminating the need for jumper cables. Also, via this connection, the reverse amplifier remotely provides power to the forward amplifier.

This invention relates to a dual-way amplifier of a new handheld phone system, which can either solve the problem of high isolation of up and down lines or can let the indoor covered receiving noise factor of the system less than 3dB and the down high power amplified three-stage mutual adjustment target to -48dBc characterizing in including a test control circuit unit, a down power amplified circuit unit, an up low noise receiving circuit unit and three time division switches.

The present invention relates to the field of electronic devices known as baluns. It concerns an active balun which is broadband and reciprocal. Embodiments of the invention integrate an active splitter balun with an active combiner balun so as to form three transmission lines. A first active coupling is provided between the first and second transmission lines and a second active coupling is provided between the first and third transmission lines. The active couplings are provided by means of amplifier cells distributed along the transmission lines. Embodiments of the invention have configurable means for polarizing the different amplifier cells so as to create a specific coupling direction between the various transmission lines. The device according to the invention can be applied in the field of broadband mixers which are used, notably, in radio transmission and reception circuits.

The invention discloses an ultra-wideband bidirectional amplifier based on a 500nm GaAs pHEMT process, which comprises a low-noise amplifier for realizing wideband and low-noise matching, a power amplifier for realizing wideband and maximum power matching, a single-pole double-throw switch A and a single-pole double-throw switch B, and two ends of a switch tube of the ultra-wideband bidirectional amplifier are respectively provided with the same 5V positive voltage control switch unit. The ultra-wideband bidirectional amplifier based on the 500nm GaAs pHEMT process can realize ultra-wideband and high-frequency coverage to 10.6 GHz at the same time, and has excellent performance of an Rx-path LNA amplifier and a Tx-path PA amplifier. In addition, the 5V positive pressure control switch units arranged at the two ends change a negative pressure control switch tube into positive pressure control, and use is more convenient.

There is provided an amplifier device for a CATV network comprising a first amplifier element for upstream signals and a second amplifier element for downstream signals, wherein the first and second amplifier elements are disposed between first and second directional couplers. The combined isolation of the first and second directional couplers is greater than the sum of the gain of the first and second amplifier elements. The first directional coupler has one port attached to an input of the downstream amplification element and one port attached to an output of an upstream amplification element (38) and the second directional coupler has one port attached to an output of the downstream amplifier and one port attached to an input of the upstream amplifier.

A monolithic microwave integrated circuit (MIMIC) for a phased array antenna system, and a phased array antenna system including the MIMIC are provided. The MIMIC includes a first amplifier including a first input terminal and a first output terminal, a second amplifier including a second input terminal and a second output terminal, a first switch connectable to the first input terminal and the second output terminal, and a second switch connectable to the first output terminal and the second input terminal.

An amplifier system an amplified path and a bypass path for carrying an RF signal. A switch in the amplified system routes the RF signal through the amplified path in response to a normal condition in the amplifier system, and routes the RF signal through the bypass path in response to an abnormal condition in the amplifier system. The amplified path includes an amplified forward circuit and a return circuit. The amplified forward circuit has an amplifier, and the return circuit has a return amplifier and detection circuitry for providing power to the return amplifier. The detection circuity provides power to the return amplifier in response to a normal condition in the return circuit, and removes power from the return amplifier in response to an abnormal condition in the return circuit.

The invention belongs to the technical field of wireless communication, and provides a bidirectional variable gain amplifier based on an active cross coupling structure, which is used for solving the problems of high additional phase shift, low maximum gain and the like of the existing differential bidirectional variable gain amplifier. The circuit is composed of two groups of active cross coupling circuits, and bidirectional control is realized through interconnection of input and output ports of the two groups of active cross coupling structures; the sum of drain electrode direct currents in different gain states is not changed, so that better insertion phase shift is realized; due to the fact that all stray capacitors Cgd in the amplifier are all counteracted, lower additional phase shift is achieved. As a tail current source is cancelled, the drain-source voltage difference is VDD, and a higher maximum gain state is realized. In conclusion, the bidirectional variable gain amplifier based on the active cross coupling structure provided by the invention has lower additional phase shift and larger maximum gain.