Abstract: Methods, systems, and apparatus are disclosed for coupling a power amplifier input signal. An example system a first amplifier including a signal input, a feedback input, and a differential output that includes a first output and a second output, a first resistor including a first resistor terminal and a second resistor terminal, wherein the first resistor terminal is coupled to the first output, a second resistor including a third resistor terminal and a fourth resistor terminal, wherein the third resistor terminal is coupled to the second resistor terminal at an output common mode node and the fourth resistor terminal coupled to the second output, and a second amplifier including a first input and a third output, wherein the first input is coupled to the second resistor terminal and third resistor terminal, and the third output is coupled to the feedback input of the first amplifier.

Abstract: An example apparatus includes: comparison circuitry configured to determine first and second frequencies from a plurality of clock count ranges and a clock count value, the plurality of clock count ranges each having a range of possible count values corresponding to possible frequencies, the first and second frequencies correspond to the clock count ranges that include the clock count value; comparator circuitry configured to generate a temperature indication based on a comparison of a temperature voltage to a reference temperature voltage; and overlap determination circuitry configured to select one of the first or second frequencies based on the comparator circuitry.

Abstract: In an embodiment, a circuit includes a first input terminal configured to be coupled to a first terminal of a first capacitor, a second input terminal configured to be coupled to a second terminal of the first capacitor, a balun including a primary inductor and a secondary inductor, and a second capacitor. The primary inductor includes a first terminal coupled to the first input terminal, a second terminal coupled to the second input terminal, a first inductive portion coupled between the first terminal of the primary inductor and a first intermediate terminal, a second inductive portion coupled between the second terminal of the primary inductor and a second intermediate terminal, and a third inductive portion coupled between the first and second intermediate terminals. The secondary inductor includes a first terminal coupled to a ground terminal. The second capacitor is coupled between the first and second intermediate terminals.

Abstract: An integrated circuit includes a first transistor and a second transistor. A first current path terminal of the second transistor is coupled to a reference voltage terminal. A first current path terminal of the first transistor is coupled to a second current path terminal of the second transistors. A second current path terminal of the first transistor is coupled to a first differential output terminal. A control terminal of the second transistor is coupled to a first differential input terminal. The integrated circuit includes a first resistor with a first terminal and a second terminal. The first terminal is coupled to the bulk terminal of the first transistor, and the second terminal is coupled to the reference voltage terminal. The first resistor is disposed in a dielectric layer above the first and second transistors.

Abstract: Embodiments disclosed herein relate to power amplifiers and topology design thereof. In an example, a circuit includes a power amplifier (PA), a voltage divider, and a bias voltage generator circuit. The PA includes a first transistor coupled to receive a first input signal, a second transistor coupled to receive a second input signal, a third transistor coupled to the first transistor and coupled to the bias voltage generator circuit, and a fourth transistor coupled to the second transistor, the bias voltage generator circuit, and the third transistor. The voltage divider includes a first resistor and a second resistor. The first resistor is coupled to the third transistor of the PA. The second resistor is coupled to the fourth transistor of the PA. The first resistor and the second resistor are coupled to each other and coupled to the bias voltage generator circuit.

Abstract: In an example, a system includes a receiver configured to receive a differential input signal from a quadrature amplitude modulation (QAM) transmitter at a differential interface that includes a first input and a second input. The system also includes a first switch coupled to the first input and a second switch coupled to the second input, where the first switch and second switch are configured to couple the first input and the second input to a complex mixer in a non-inverting configuration. The system includes a third switch coupled to the first input and a fourth switch coupled to the second input, where the third switch and the fourth switch are configured to couple the first input and the second input to the complex mixer in an inverting configuration. The complex mixer is configured to produce an output signal based on the non-inverting configuration and the inverting configuration.

Abstract: An example apparatus includes: comparison circuitry configured to determine first and second frequencies from a plurality of clock count ranges and a clock count value, the plurality of clock count ranges each having a range of possible count values corresponding to possible frequencies, the first and second frequencies correspond to the clock count ranges that include the clock count value; comparator circuitry configured to generate a temperature indication based on a comparison of a temperature voltage to a reference temperature voltage; and overlap determination circuitry configured to select one of the first or second frequencies based on the comparator circuitry.

Abstract: In an example, a system includes a receiver configured to receive a differential input signal from a quadrature amplitude modulation (QAM) transmitter at a differential interface that includes a first input and a second input. The system also includes a first switch coupled to the first input and a second switch coupled to the second input, where the first switch and second switch are configured to couple the first input and the second input to a complex mixer in a non-inverting configuration. The system includes a third switch coupled to the first input and a fourth switch coupled to the second input, where the third switch and the fourth switch are configured to couple the first input and the second input to the complex mixer in an inverting configuration. The complex mixer is configured to produce an output signal based on the non-inverting configuration and the inverting configuration.

Abstract: Methods, systems, and apparatus are disclosed for coupling a power amplifier input signal. An example system a first amplifier including a signal input, a feedback input, and a differential output that includes a first output and a second output, a first resistor including a first resistor terminal and a second resistor terminal, wherein the first resistor terminal is coupled to the first output, a second resistor including a third resistor terminal and a fourth resistor terminal, wherein the third resistor terminal is coupled to the second resistor terminal at an output common mode node and the fourth resistor terminal coupled to the second output, and a second amplifier including a first input and a third output, wherein the first input is coupled to the second resistor terminal and third resistor terminal, and the third output is coupled to the feedback input of the first amplifier.

Abstract: An integrated circuit device is provided. In some examples, the integrated circuit device includes a first amplifier path, a second amplifier path coupled in parallel with the first amplifier path, a matching network coupled to the first amplifier path and the second amplifier path, and an antenna coupled to the matching network. In some such examples, the first amplifier path includes a first differential power amplifier coupled to the matching network, and the second amplifier path includes a second differential power amplifier coupled to the matching network. The integrated circuit device may further include a controller coupled to selectively enable the first amplifier path to provide a transmitter output power within a first range and to selectively enable the second amplifier path to provide a transmitter output power within a second range that is different from the first range.

Abstract: A wireless transceiver. The transceiver includes: (i) a transmit signal path; (ii) a calibration path, comprising a conductor to connect a calibration tone into the transmit signal path; (iii) a receive signal path, comprising a first data signal path to process a first data and a second data signal path, different than the first data signal path, to process a second data; (iv) a first capacitive coupling to couple a response to the calibration tone from the transmit signal path to the first data signal path; and (v) a second capacitive coupling to couple a response to the calibration tone from the transmit signal path to the second data signal path.

Abstract: A transmitter comprises an antenna array demultiplexor having a first input for an output signal, a second input for a control signal, a first output coupled to a first output pin, and a second output coupled to a second output pin. The antenna array demultiplexor provides the output signal to the first or second output based on the control signal. The first and second output pins are coupled to first and second antennae, respectively. In some implementations, the transmitter includes a transformer and a capacitor coupled in parallel between the first and second output pins, and the antenna array demultiplexor comprises a first switch coupled between the first output pin and a first ground pin, and a second switch coupled between the second output pin and a second ground pin. The first switch receives a second control signal, and the second switch receives an inverse of the second control signal.

Abstract: A wireless transceiver. The transceiver includes: (i) a transmit signal path; (ii) a calibration path, comprising a conductor to connect a calibration tone into the transmit signal path; (iii) a receive signal path, comprising a first data signal path to process a first data and a second data signal path, different than the first data signal path, to process a second data; (iv) a first capacitive coupling to couple a response to the calibration tone from the transmit signal path to the first data signal path; and (v) a second capacitive coupling to couple a response to the calibration tone from the transmit signal path to the second data signal path.

Abstract: A transmitter comprises an antenna array demultiplexor having a first input for an output signal, a second input for a control signal, a first output coupled to a first output pin, and a second output coupled to a second output pin. The antenna array demultiplexor provides the output signal to the first or second output based on the control signal. The first and second output pins are coupled to first and second antennae, respectively. In some implementations, the transmitter includes a transformer and a capacitor coupled in parallel between the first and second output pins, and the antenna array demultiplexor comprises a first switch coupled between the first output pin and a first ground pin, and a second switch coupled between the second output pin and a second ground pin. The first switch receives a second control signal, and the second switch receives an inverse of the second control signal.

Abstract: One example includes a device that is comprised of a pre-power amplifier, a power amplifier, a signal path, and a dynamic bias circuit. The pre-power amplifier amplifies an input signal and outputs a first amplified signal. The power amplifier receives the first amplified signal and amplifies the first amplified signal based on a dynamic bias signal to produce a second amplified signal at an output thereof. The signal path is coupled between an output of the pre-power amplifier and an input of the power amplifier. The dynamic bias circuit monitors the first amplified signal, generates the dynamic bias signal, and outputs the dynamic bias into the signal path.

Abstract: In an example, a system includes a receiver configured to receive a differential input signal from a quadrature amplitude modulation (QAM) transmitter at a differential interface that includes a first input and a second input. The system also includes a first switch coupled to the first input and a second switch coupled to the second input, where the first switch and second switch are configured to couple the first input and the second input to a complex mixer in a non-inverting configuration. The system includes a third switch coupled to the first input and a fourth switch coupled to the second input, where the third switch and the fourth switch are configured to couple the first input and the second input to the complex mixer in an inverting configuration. The complex mixer is configured to produce an output signal based on the non-inverting configuration and the inverting configuration.

Abstract: One example includes a device that is comprised of a pre-power amplifier, a power amplifier, a signal path, and a dynamic bias circuit. The pre-power amplifier amplifies an input signal and outputs a first amplified signal. The power amplifier receives the first amplified signal and amplifies the first amplified signal based on a dynamic bias signal to produce a second amplified signal at an output thereof. The signal path is coupled between an output of the pre-power amplifier and an input of the power amplifier. The dynamic bias circuit monitors the first amplified signal, generates the dynamic bias signal, and outputs the dynamic bias into the signal path.

Abstract: A wireless transceiver. The transceiver includes: (i) a transmit signal path; (ii) a calibration path, comprising a conductor to connect a calibration tone into the transmit signal path; (iii) a receive signal path, comprising a first data signal path to process a first data and a second data signal path, different than the first data signal path, to process a second data; (iv) a first capacitive coupling to couple a response to the calibration tone from the transmit signal path to the first data signal path; and (v) a second capacitive coupling to couple a response to the calibration tone from the transmit signal path to the second data signal path.

Abstract: One example includes a device that is comprised of a pre-power amplifier, a power amplifier, a signal path, and a dynamic bias circuit. The pre-power amplifier amplifies an input signal and outputs a first amplified signal. The power amplifier receives the first amplified signal and amplifies the first amplified signal based on a dynamic bias signal to produce a second amplified signal at an output thereof. The signal path is coupled between an output of the pre-power amplifier and an input of the power amplifier. The dynamic bias circuit monitors the first amplified signal, generates the dynamic bias signal, and outputs the dynamic bias into the signal path.

Abstract: A wireless transceiver. The transceiver includes: (i) a transmit signal path; (ii) a calibration path, comprising a conductor to connect a calibration tone into the transmit signal path; (iii) a receive signal path, comprising a first data signal path to process a first data and a second data signal path, different than the first data signal path, to process a second data; (iv) a first capacitive coupling to couple a response to the calibration tone from the transmit signal path to the first data signal path; and (v) a second capacitive coupling to couple a response to the calibration tone from the transmit signal path to the second data signal path.