摘要:
An electronic device with a Frequency Modulation (FM) antenna includes an earphone jack, an FM chip, a switching unit, and a processing unit. The earphone jack includes a left channel pin, a right channel pin, and a ground pin. The FM chip receives an FM signal and outputs a Receive Signal Strength Indicator (RSSI) value of the FM signal to the processing unit. The processing unit receives the RSSI value, compares the RSSI value with a predetermined value, and controls the switching unit to select the left and right channel pins as a signal receiving point of the FM antenna or select the ground pin as the signal receiving point of the FM antenna according to a result of the comparison.
摘要:
A portable electronic device includes a display unit, a first audio unit, a second audio unit, a first sensing unit, a second sensing unit, and a controlling unit. The first audio unit includes a first speaker and a first microphone. The second audio unit includes a second speaker and a second microphone. The first sensing unit senses an orientation of the portable electronic device. The second sensing unit senses whether a user is close to one of the first speaker and the second speaker. The controlling unit triggers one of the first audio unit and the second audio unit to output and input audio signals according to the orientation of the portable electronic device and turns off the display unit when the user is close to the one of the first speaker and the second speaker.