55results about "Two-way amplifiers" patented technology

A low-noise amplifier (LNA) includes a first transistor, a second transistor, and a load coupled to a drain of the first transistor and a drain of the second transistor. The LNA also includes a first reactive impedance matching network including a first inductor and a second inductor inductively coupled with the first inductor, wherein the first inductor is coupled to a source of the first transistor, and the second inductor is coupled to a gate of the first transistor. The LNA also includes a second reactive impedance matching network including a third inductor and a fourth inductor inductively coupled with the third inductor, wherein the third inductor is coupled to a source of the second transistor, and the fourth inductor is coupled to a gate of the second transistor. The LNA also includes a switching circuit configured to enable or disable each of the reactive impedance matching networks.

Bidirectional variable gain amplifiers (VGAs) for radio frequency (RF) communication systems are provided. In certain embodiments, a bidirectional VGA includes a first amplifier having an input coupled to a transmit / receive port, a second amplifier having an output coupled to a transmit port, a third amplifier having an input coupled to a receive port, a fourth amplifier having an output coupled to the transmit / receive port and to the input of the first amplifier, and a switch circuit that connects an output of the first amplifier to an input of the second amplifier in a transmit mode, and that connects an output of the third amplifier to an input of the fourth amplifier in a receive mode.

A radio frequency circuit includes a first radio frequency circuit, a second radio frequency circuit, and a first switch circuit. The first switch circuit includes a first terminal connected to an antenna connection terminal, a second terminal connected to the first radio frequency circuit, and a third terminal connected to the second radio frequency circuit. The first radio frequency circuit includes a first power amplifier circuit supporting a first power class, and a first filter circuit connected to the first power amplifier circuit and having a passband that includes a first band. The second radio frequency circuit includes a second power amplifier circuit supporting a second power class having a maximum output power greater than a maximum output power of the first power class. The second radio frequency circuit includes a second filter circuit connected to the second power amplifier circuit and having a passband that includes the first band.

An apparatus for wireless communications includes a power amplifier, a low-noise amplifier, a power detector, and a transformer. The transformer includes a first inductor coupled to an output of the power amplifier, and a second inductor coupled to an antenna, wherein the second inductor is magnetically coupled with the first inductor. The transformer also includes a third inductor coupled to an input of the low-noise amplifier, wherein the third inductor is magnetically coupled with the second inductor. The transformer also includes a coupling inductor coupled to an input of the power detector, wherein the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.

A full duplex carrier aggregation, RF, wireless transceiver (100) is disclosed. The RF wireless transceiver (100) comprises: a single transmit and receive antenna (110) for: performing an RF transmit based on a transmit signal and generating a receive signal based on an RF receive; the invention relates to a power amplifier (100) comprising a plurality of cascaded quadrature balanced power amplifier (QBPA) modules (120a to n), in which each QBPA module (120a to n) comprises a transmit signal port (121a, b), an antenna port (122a, b), a receive signal port (123a, b), and a cancel signal port (124a, b), and a plurality of cascaded quadrature balanced power amplifier (QBPA) modules (120a to n), in which each QBPA module (120a to n) comprises a transmit signal port (121a, b), an antenna port (122a, b), a receive signal port (123a, b), and a cancel signal port (124a, b). The antenna port (121a) of the first QBPA module (120a) is connected with the antenna (110); and the antenna port (121b) of the second QBPA module (120b) is connected with the signal receiving port of the first QBPA module (120a). Each QBPA module (120a to n) is configured to: receive a transmit input signal at the transmit signal port (121a, b); receiving a receive signal at the antenna port (122a, b); receiving a cancellation input signal at the cancellation signal port (124a, b); generating a transmit signal based on the transmit input signal and outputting the transmit signal through the antenna port (122a, b); a cancellation signal is generated based on the cancellation input signal, and the cancellation signal and the reception signal are output at the reception signal port (123a, b).

An exemplary complementary bi-directional amplifier (e.g., for 5G wireless systems in RF and mm-Wave frequencies, RADAR, etc.) and methods are disclosed that employ an integrated front-end transmitter (TX) and receiver (RX) chains in each array pixel (or antenna) that can employ minimum silicon area or package area to form a co-apertured low-cost array. The exemplary complementary bi-directional amplifier addresses integration issue and can provide a system with broad operation bandwidth, ultra-compactness, high-linearity, low noise, and high efficiency at both RF and mm-Wave frequencies for both small-signal and large-signal operations.

A millimeter wave (mmW) communication system located on a millimeter wave integrated circuit (MMW-IC) includes a phase shifter selectively connected to a receive path by a first electromagnetic (EM) element and selectively connected to a transmit path by a second EM element, the first EM element configured to receive a transmit signal and configured to receive a receive signal from a low noise amplifier (LNA), the second EM element configured to receive a phase shifted transmit signal or a phase shifted receive signal from the phase shifter, and wherein the second EM element is configured to selectively provide the phase shifted transmit signal to a power amplifier on the mmW-IC and the phase shifted receive signal to receive signal processing circuitry located off of the mmW-IC.

A bidirectional RF circuit, preferably including a plurality of terminals, a switch, a transistor, a coupler, and a feedback network. The circuit can optionally include a drain matching network, an input matching network, and / or one or more tuning inputs. In some variations, the circuit can optionally include one or more impedance networks, such as an impedance network used in place of the feedback network; in some such variations, the circuit may not include a coupler, switch, and / or input matching network. A method for circuit operation, preferably including operating in an amplifier mode, operating in a rectifier mode, and / or transitioning between operation modes.

A circuit comprises an amplifier (706) and a bias circuit. The amplifier (706) comprises an output transistor comprising a source electrode, a drain electrode, and a gate electrode. The bias circuit comprises: a first control loop configured to set a first quiescent bias for the output transistor based on a first value of a first control voltage and a second value of a second control voltage, wherein the first quiescent bias is configured to put the output transistor in an on state; and a second control loop configured to set a second quiescent bias for the output transistor based on the first value of the first control voltage and the second value of the second control voltage. The second quiescent bias is configured to put the output transistor in an off state and to increase an insertion loss of the amplifier when the output transistor is in the off state.

An apparatus (305) includes a low noise amplifier (320) having an input and an output, a first switch (330) coupled between the input of the low noise amplifier (320) and the output of the low noise amplifier (320), and a transformer (345) including a first inductor (350) and a second inductor (360), wherein the first inductor (350) is coupled to the output of the low noise amplifier (320). The apparatus (305) also includes a power amplifier (370) having an input and an output, and a switching circuit (380) coupled between the output of the power amplifier (370) and the second inductor (360).

Embodiments of the present application provide a RF front-end circuit and an electronic device. The RF front-end circuit includes: a first Tx channel and a second Tx channel, where the Tx channel includes a first PA and a first unit, the first unit between an output of the first PA and an antenna port of the RF front-end circuit is configured as a first resonant tank when the second Tx channel operates in transmit mode, the antenna port is coupled to an antenna, the second Tx channel includes a second PA, and an output of the second PA is coupled to the antenna port. According to the above technical solution, a plurality of transceiver systems may be able to share a single antenna port, thereby reducing the complexity of PCB routing.

To provide a bidirectional amplifier circuit suitable for a radio transmission / reception circuit.SOLUTION: A bi-directional amplifier circuit 10 includes a plurality of amplifier circuits 11 each having a field-effect transistor 12 having a gate to which a bias voltage is applied, a first choke inductor 13 connected to a first input / output terminal T1 of the field-effect transistor 12, and a second choke inductor 14 connected to a second input / output terminal T2 of the field-effect transistor 12. A first mode in which a first input / output terminal T1 of one amplifier circuit 11 and a second input / output terminal T2 of another amplifier circuit 11 are connected to each other via a DC cut-off circuit 15 and a power source voltage and a ground potential are applied to a first choke inductor 13 and a second choke inductor 14 of the plurality of amplifier circuits 11, respectively, and a second mode in which the ground potential and the power source voltage are applied to the first choke inductor 13 and the second choke inductor 14, respectively, are switched so that the input / output direction can be reversed.SELECTED DRAWING: Figure 1

To provide bidirectional variable gain amplifiers (VGAs) for radio frequency (RF) communication systems.SOLUTION: A bidirectional VGA 120 includes a first amplifier A1 having an input coupled to a transmit / receive port TR, a second amplifier A2 having an output coupled to a transmit port TX, a third amplifier A3 having an input coupled to a receive port RX, a fourth amplifier A4 having an output coupled to the transmit / receive port TR and to the input of the first amplifier A1, and a switch circuit S1, S2 that connects an output of the first amplifier A1 to an input of the second amplifier A2 in a transmit mode, and that connects an output of the third amplifier A3 to an input of the fourth amplifier A4 in a receive mode.SELECTED DRAWING: Figure 4

A bidirectional RF circuit, preferably including a plurality of terminals, switches, transistors, couplers, and a feedback network. The circuit may optionally include a drain matching network, an input matching network, and / or one or more tuning inputs. In some variations, the circuit may optionally include one or more impedance networks, such as an impedance network used in place of a feedback network, and in some such variations, the circuit may not include a coupler, a switch, and / or an input matching network. A method for circuit operation, preferably including operating in an amplifier mode, operating in a rectifier mode, and / or transitioning between operating modes.

A bi-directional amplifier device 10 comprises a first directional coupler 12 and a second directional coupler 14 connected together to create separate upstream 16 and downstream 18 signal paths with an upstream amplifier 24 in the upstream signal path and a downstream amplifier 24’ in the downstream signal path. An isolator unit 40, comprising a digital processor element (DSP) (Fig.7, 56), is connected to the upstream amplifier and digitally filters the upstream signal to remove all downstream signal frequencies before amplification takes place. The isolator unit may also be connected to the downstream amplifier to remove upstream signal frequencies from the downstream signal. The isolator unit may include analogue-to-digital converters (ADC) (Fig.7, 58, 60, 72) to convert analogue downstream and upstream signals into digital signals for processing by the DSP, and digital to analogue converters (DAC) (Fig.7, 62, 74) to convert filtered upstream and downstream signals to analogue signals for input to the respective upstream or downstream amplifier. A third directional coupler 50 may be positioned in the downstream path, with a coupler port 54 connected to the isolator unit. The bi-directional amplifier device is suited for use in broadband or cable television (CATV) networks.

A front end module includes a low noise amplifier configured to amplify a receiving signal; a power amplifier configured to amplify a transmitting signal; a first switch positioned in a first path that bypasses the low noise amplifier and configured to form the first path; and a second switch positioned in the first path, connected to the first switch at a first node in the first path, and configured to form the first path together with the first switch, wherein an output terminal of the power amplifier is connected to the first node.

A full duplex communication RF wireless transceiver (100) is disclosed. The RF wireless transceiver (100) comprises a single transmit and receive antenna (110) for performing an RF transmit based on a transmit signal and generating a receive signal based on an RF receive. Further, the RF wireless transceiver (100) comprises a Quadrature Balanced Power Amplifier (QBPA) module (120), where the QBPA module (120) comprises a transmit signal port (121), an antenna port (122) connected to the antenna (110), a receive signal port (123), and a cancel signal port (124); the QBPA module (120) is configured to: receive a transmit input signal at the transmit signal port (121); receiving a receive signal at the antenna port (122); generating a transmit signal based on the transmit input signal, and outputting the transmit signal through the antenna port (122); a portion of the transmit signal is reflected to the cancellation signal port (124). The RF wireless transceiver (100) further comprises a cancellation input signal generator (130) for generating a cancellation input signal at the cancellation signal port (124) of the QPBA module (120) based on the reflected portion of the transmit signal. The QBPA module (120) is further configured to generate a cancellation signal based on the cancellation input signal and output the receive signal and the cancellation signal at the receive signal port (123) to cancel transmit leakage.

A millimeter wave (mmW) communication system on a millimeter wave integrated circuit (MMW-IC) includes a phase shifter selectively connected to a receive path through a first electromagnetic (EM) element and selectively connected to a transmit path through a second EM element, the first EM element is configured to receive a transmit signal and configured to receive a receive signal from a low noise amplifier (LNA), and the second EM element is configured to receive a phase shifted transmit signal or a phase shifted receive signal from a phase shifter, and wherein the second EM element is configured to selectively provide the phase shifted transmit signal to a power amplifier on the mmW-IC and to provide the phase shifted receive signal to a receive signal processing circuit located outside the mmW-IC.

An apparatus for bidirectional variable gain amplification is disclosed. In an exemplary aspect, the apparatus includes an antenna element of an antenna array and a wireless transceiver. The wireless transceiver includes a transmit path coupled to the antenna element, a receive path coupled to the antenna element, and a phase shifter disposed in both the transmit path and the receive path. The phase shifter is configured to operate in an active mode and includes a first bidirectional variable gain amplifier and a second bidirectional variable gain amplifier.

Performance is improved in a wireless communication terminal in which an antenna is connected to a transmission circuit and a reception circuit. A transmission / reception switching circuit includes a first N-type transistor and a second N-type transistor. The first N-type transistor has a drain connected to the antenna and a gate to which a constant voltage is applied. Furthermore, the second N-type transistor has a drain connected to a source of the first N-type transistor and a gate to which a transmission signal is input. Furthermore, the second N-type transistor supplies a reception signal from one of a source and the drain.

A preamplifier circuit with coupling for wired bidirectional communication with power is provided. The preamplifier circuit includes a cable connector interface including coupling for two lines; a resistor network coupled to the cable connector interface via the two lines; a transceiver coupled to the resistor network for simultaneous bidirectional communication; a plurality of capacitors arranged between the resistor network and the transceiver; and a power bus coupled to the cable connector interface via the two lines for generating a DC power signal for the preamplifier circuit including the transceiver. A clock signal can be received from a hub front-end simultaneously with outputting a data signal to the hub front-end based on a sensor input. A cable connected between the hub front-end and the preamplifier circuit can be a shielded, two wire cable.

The present relates to a Radio Frequency (RF) front end for wireless communications, in particular for use in a Half Duplex (HD) and / or Full Duplex (FD) transceiver. The RF front end of the invention is especially based on a Quadrature Balanced Power Amplifier (QBPA). The RF front end comprises an antenna port for outputting a transmit signal to and receiving a receive signal from an antenna, and a receive port for outputting the receive signal to a signal processing section. Further, it comprises the QBPA, which is configured to: receive a transmit input signal at a first port, receive a cancellation input signal at a fourth port, and receive the receive signal at a second port connected to the antenna port. Further, the QBPA is configured to generate the transmit signal from the transmit input signal and output the transmit signal at the second port, and generate a cancellation signal from the cancellation input signal and output the cancellation signal and the receive signal at a third port connected to the receive port.

A load inductor has first and second nodes. The first node couples to a first terminal of a first switch. A second terminal of the first switch couples to an output of a first low noise amplifier (LNA). The second node couples to a third terminal of a second switch. A fourth terminal of the second switch couples to an output of a second LNA. In response to receiving a single-ended signal at the first LNA, the first LNA is turned on, the first switch is closed, the second LNA is turned off, and the second switch is opened. In response to receiving the signal at the second LNA input, the first LNA is turned off, the first switch is opened, the second LNA is turned on, and the second switch is closed. The signal is transformed to a differential signal across the first and second inductor nodes.

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 temperature controlled phase compensation circuit may include a varactor coupled between a radio frequency (RF) transmission line and a node. A temperature controlled phase compensation circuit may include a resistance coupled between a voltage supply and the node, the voltage supply configured to supply a supply voltage. A temperature controlled phase compensation circuit may include a temperature controlled current source coupled to the node and configured to produce a capacitor voltage between the varactor and the resistance, wherein a capacitor voltage produced at the node and applied to the varactor is inversely related to temperature.

According to an example aspect of the present invention, there is provided an apparatus for an antenna, comprising, a first power amplifier and a second power amplifier and a common ground between the first power amplifier and the second power amplifier, wherein a Radio Frequency, RF, output of the first power amplifier is coupled to the common ground and a RF output of the second power amplifier is coupled to the common ground.

The reconfigurable bidirectional amplifier comprises a first artificial surface plasmon transmission line, a second artificial surface plasmon transmission line, a third artificial surface plasmon transmission line and a switch amplification multifunctional chip, the first artificial surface plasmon transmission line, the second artificial surface plasmon transmission line and the third artificial surface plasmon transmission line are loaded on a dielectric substrate, and the lengths of the first artificial surface plasmon transmission line and the second artificial surface plasmon transmission line are the same. The switch amplification multifunctional chip port comprises a port A, a port B, a port C and a port D. The port A is connected with the SMA connector port through a first artificial surface plasmon transmission line, the port B is connected with the SMA connector port through a second artificial surface plasmon transmission line, the port C is connected with the control port I through a third artificial surface plasmon transmission line, and the port D is connected with the control port II through a third artificial surface plasmon transmission line. The port D is connected with the control port II through a power-up control wire; reconfigurable bidirectional amplification of the switch amplification multifunctional chip is realized by controlling the power-up voltages of the port C and the port D. The reconfigurable bidirectional amplifier can be applied to a transceiving system and has important engineering implementation value.

There is provided an amplifier device comprising a first directional coupler (12: 30, 32) and a second directional coupler (14: 30′, 32′) connected together so as to create separate upstream (16) and downstream (18) paths in which amplifier means (24, 24′) are located, wherein the first and second directional couplers (12, 14: 30, 32; 30′, 32′) are configured to have different signal loss characteristics, one of the directional couplers having low signal loss characteristics for upstream signals and the other directional coupler having low signal loss characteristics for downstream signals. The signal loss characteristics are preferably the coupling loss of each directional coupler (12, 14: 30, 32; 30′, 32′). The first and second directional couplers may each comprise a microstrip directional coupler (30; 30′) connected to a ferrite directional coupler (50; 50′).