26results about "Two-way amplifiers" patented technology

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.

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 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.

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 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 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.

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.

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.

Disclosed is a transmitter for transmitting radio frequency and millimeter wavelength signals. The transmitter comprises a first and a second transmission path, each transmission path having a signal with a different phase. The transmitter also comprises a first driver amplifier on the first transmission path and a second driver amplifier on the second transmission path, each of the first and second driver amplifiers receiving an input signal mixed with a carrier signal. The also transmitter comprises a first Doherty power amplifier on the first transmission path and a second Doherty power amplifier on the second transmission path, each of the first and the second Doherty power amplifiers having an input with a different phase and being configured to operate separately, wherein first driver amplifier is paired with the first Doherty power amplifier and the second driver amplifier is paired with the second Doherty power amplifier.

An electronic device may include a communication processor, a transceiver, an antenna, a power supply module, and a communication circuit. The communication circuit includes an input terminal configured to acquire a signal transmitted from the transceiver, an amplifier module, an output terminal configured to transmit a signal to the transceiver, an antenna terminal connected to the antenna, a first switch connected to the input terminal and the amplifier module, a second switch connected to the amplifier module and the output terminal, and a third switch connected to the first switch, the second switch, and the antenna terminal.

Disclosed is a bidirectional amplifier. The bidirectional amplifier includes a first matching circuit, a second matching circuit, an amplifier circuit connected between the first matching circuit and the second matching circuit, that amplifies a first input signal received from the first matching circuit to output the amplified first input signal to the second matching circuit, and that amplifies a second input signal received from the second matching circuit to output the amplified first input signal to the first matching circuit, and the first and second matching circuits have a symmetrical structure and operate complementary to each other.

A millimeter-wave (mmW) communication system arranged on a millimeter-wave integrated circuit (MMW-IC) includes a phase shifter selectively connected to a receiving path by a first electromagnetic (EM) element and selectively connected to a transmitting path by a second EM element; a first EM element configured to receive a transmit signal and a received signal from a low-noise amplifier (LNA); and a second EM element configured to receive a phase-shifted transmit signal or a phase-shifted received signal from the phase shifter, 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 received signal to a received signal processing circuit located away from the mmW-IC.

A radio frequency integrated circuit (RFIC) comprising: a power amplifier (PA) connected to an antenna (348) by a first electromagnetic (EM) element, the PA configured to receive a transmit signal from a second EM element; a low noise amplifier (LNA) connected to the first EM element and the second EM element, the power amplifier and the LNA comprising separate amplifier cores, and wherein the first EM element comprises a first plurality of interwound windings occupying a first common area, and the second EM element comprises a second plurality of interwound windings occupying a second common area.

An apparatus (110) for wireless communication includes a power amplifier (120), a low noise amplifier (130), a power detector (160), and a transformer (240). The transformer (240) includes: a first inductor coupled to an output of the power amplifier (130); and a second inductor coupled to an antenna (180), where the second inductor is magnetically coupled with the first inductor. The transformer (240) also includes a third inductor coupled to an input of the low noise amplifier (130), where the third inductor is magnetically coupled with the second inductor. The transformer (240) also includes a coupling inductor coupled to an input of the power detector (160), where the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.

An electronic device may include a communication processor, a transceiver, an antenna, a power supply module, and a communication circuit. The communication circuit includes an input terminal configured to acquire a signal transmitted from the transceiver, an amplifier module, an output terminal configured to transmit a signal to the transceiver, an antenna terminal connected to the antenna, a first switch connected to the input terminal and the amplifier module, a second switch connected to the amplifier module and the output terminal, and a third switch connected to the first switch, the second switch, and the antenna terminal.

An apparatus is disclosed for bi-directional amplification with phase shifting. In an example implementation, an apparatus includes a phase shifter having a bi-directional amplifier. The bi-directional amplifier includes a first transistor (T1) coupled between a first positive node (606-1P) and a second negative node (606-2M), a second transistor (T2) coupled between a first negative node (606-1M) and a second positive node (606-2P), a third transistor (T3) coupled between the first positive node (606-1P) and the second negative node (606-2M), and a fourth transistor (T4) coupled between the first negative node (606-1M) and the second positive node (606-2P). The bi-directional amplifier also includes a fifth transistor (T5) coupled between the first positive node (606-1P) and the second positive node (606-2P), a sixth transistor (T6) coupled between the first negative node (606-1M) and the second negative node (606-2M), a seventh transistor (T7) coupled between the first positive node (606-1P) and the second positive node (606-2P), and an eighth transistor (T8) coupled between the first negative node (606-1M) and the second negative node (606-2M).

A front-end configuration of a transceiver combines two sets of Power Amplifiers (PA) (each set comprising, e.g., one differential PA or two single-ended PAs in anti-phase) and two Quadrature Hybrid Couplers (QHC) as a balanced PA circuit that is robust to load modulation. A Low Noise Amplifier (LNA) is connected, and protected from direct and reflected TX signals, such that a TX / RX antenna switch is not needed. The ISO ports of the two QHCs are connected to a symmetrical passive 3-port network connected to the LNA input. In TX-mode, inputs of the 3-port network are excited differentially, and the network terminates any TX signal reflected from the antenna in a resistive load, while presenting a virtual ground at its input. In Rx mode, the output impedances of the sets of PAs are reconfigured to make the received signal appear at the inputs of the 3-port network in common-mode.

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

A circuit comprises an amplifier and a bias circuit. The amplifier 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.

The circuit includes an amplifier (706) and a bias circuit. The amplifier (706) includes an output transistor having a source electrode, a drain electrode, and a gate electrode. The bias circuit includes a first control loop configured to set a first quiescent bias of the output transistor based on a first value of a first control voltage and a second value of a second control voltage, the first quiescent bias being configured to turn the output transistor ON, and a second control loop configured to set a second quiescent bias of the output transistor based on a first value of a first control voltage and a second value of a second control voltage. The second quiescent bias is configured to turn the output transistor OFF and to increase the insertion loss of the amplifier when the output transistor is OFF.

The present invention improves the performance of a wireless communication terminal in which an antenna is connected to a transmission circuit and a reception circuit.　This transmission-reception switching circuit comprises a first N-type transistor and a second N-type transistor. The drain of the first N-type transistor is connected to an antenna, and a certain voltage is applied to the gate of the first N-type transistor. In addition, the drain of the second N-type transistor is connected to the source of the first N-type transistor, and a transmission signal is inputted to the gate of the second N-type transistor. In addition, a reception signal is supplied from one of the source and drain of the second N-type transistor.