摘要:
A power distribution network includes multiple charge storage components and multiple charging circuits to control the charging and discharging of the charge storage components, which may comprise a battery and a supercapacitor. By appropriate arrangement and selection of the storage components, ripple in the power supply voltage, whose propagation to other components relying on the power distribution network may cause an audible buzz, may be significantly reduced. Additionally, appropriate arrangement and selection of the storage components, electromagnetic interference may also be significantly reduced.
摘要:
A communications device (500') may include an In-phase (I) circuit having an In-phase modulator and mixer circuit (503'-506a'), and an I power amplifier (512a') circuit coupled thereto, the I circuit configured to modulate and amplify a digital baseband I signal (601a'-601b') to generate an amplified I signal, and a Quadrature (Q) circuit having a Q modulator and mixer circuit (503'-506b'), and a Q power amplifier circuit (512b') coupled thereto, the Q circuit configured to modulate and amplify a digital baseband Q signal (601c'-601d') to generate an amplified Q signal separate from the amplified I signal. The communications device may include a processor (530') configured, for example, to selectively switch the digital baseband I signal and the digital baseband Q signal between the I and Q signal inputs to provide selective phase shifting for the digital baseband I and Q signals. For example, the controller may selectively phase shift the digital baseband I and Q signals, and control the I and Q power amplifier circuits to vary an amplitude of the amplified I and Q signals.
摘要:
A mobile wireless communications device (10) includes a wireless local area network (WLAN) radio (14) configured to generate a WLAN transmit signal, and a Bluetooth radio (16) configured to generate a Bluetooth transmit signal. A circulator (24) is coupled downstream of an antenna (25). A transmit path couples the WLAN radio and the Bluetooth radio to the circulator such that the WLAN radio and the Bluetooth radio are capable of transmitting simultaneously. In addition, a receive path also couples the WLAN radio and the Bluetooth radio to the circulator such that the WLAN radio and the Bluetooth radio are capable of receiving simultaneously.
摘要:
A communications device (500"') may include an In-phase (I) circuit having an In-phase modulator and mixer circuit (503"'-506a"'), and an I power amplifier (512a"') circuit coupled thereto, the I circuit configured to modulate and amplify a digital baseband I signal (601a"'-601b"') to generate an amplified I signal, and a Quadrature (Q) circuit having a Q modulator and mixer circuit (503"'-506b"'), and a Q power amplifier circuit (512b"') coupled thereto, the Q circuit configured to modulate and amplify a digital baseband Q signal (601c"'-601d"') to generate an amplified Q signal separate from the amplified I signal. The communications device may include a processor (530"') configured to compare the digital baseband I and Q signals with the demodulated I and Q signals to compensate for errors, selectively phase shift at least one of the digital baseband I and Q signals, and control at least one of the I and Q power amplifier circuits to vary an amplitude of at least one of the amplified I and Q signals.
摘要:
A communications device, in one aspect as a portable wireless communications device, includes an in-phase modulator and power amplifier that receives a baseband I signal and modulates and amplifies the I signal. A quadrature modulator and power amplifier receives a baseband Q signal and modulates and amplifies the Q signal. A power combiner sums and outputs the I and Q signals. An I demodulator circuit receives a signal fed back from the I power amplifier and demodulates the fed back signal to produce demodulated I signals. A Q demodulator circuit receives a signal fed back from the Q power amplifier and demodulates the fed back signal to produce demodulated Q signals. A processor compares the digital, baseband I and Q signals with a demodulated I and Q signals to compensate for amplitude, frequency and phase modulation errors.
摘要翻译:一种通信设备,在作为便携式无线通信设备中的一个方面,包括在相调制器和功率放大器确实接收基带I信号并调制和放大该I信号。 正交调制器和功率放大器接收基带Q信号并调制和放大该Q信号。 功率组合求和,并输出I和Q信号。 I解调器电路接收从I功率放大器反馈的信号并解调该反馈信号以产生解调的I信号。 A Q解调器电路接收从Q功率放大器反馈的信号并解调该反馈信号以产生解调的Q信号。 处理器比较数字基带I和Q信号与解调的I和Q信号,以补偿幅度,频率和相位调制误差。
摘要:
An electronic device may include a housing including a speaker compartment, processing circuitry within the housing, and wireless transceiver circuitry within the housing and coupled to the processing circuitry. The electronic device may also include NFC transceiver circuitry within the housing and coupled to the processing circuitry, a speaker in the speaker compartment and coupled to the processing circuitry, and an NFC antenna positioned within the speaker compartment and coupled to the NFC transceiver circuitry.