Duty-to-voltage amplifier, fm receiver and method for amplifying a peak of a multiplexed signal
AssigneeMediatek Inc.
InventorsHsiang-Hui CHANG, Chieh Hung CHEN
Life of this patent
Estimating the term…
Abstract
A FM receiver comprises an IF filter, a demodulator and a decoder. The IF filter generates an RSSI and a FM modulated signal in response to a FM signal. The demodulator comprises a duty-to-voltage amplifier for amplifying a peak of a MPX signal. The duty-to-voltage amplifier comprises a current source, a switch and a current splitter. The current source generates a current. The switch controls a flow of the first current in response to a PWM signal. The current splitter splits the flow of the current into a sub-flow in response to the RSSI. The peak of the MPX signal is proportional to the sub-flow. The decoder receives the MPX signal to generate an audio signal to play sound.
Claims18
A FM receiver, comprising:
- an intermediate frequency (IF) filter for generating an RSSI and a FM modulated signal in response to a FM signal;
- a demodulator for generating a MPX signal in response to the FM modulated signal and for amplifying a peak of the MPX signal in response to the RSSI;
- and
- a decoder for receiving the MPX signal and generating an audio signal in response to the peak.
A FM receiver, comprising:
- filter means for generating an RSSI and a FM modulated signal in response to a FM signal;
- demodulator means for generating a MPX signal in response to the FM modulated signal and for amplifying a peak of the MPX signal in response to the RSSI;
- and
- decoder means for receiving the MPX signal and generating an audio signal in response to the peak.
A method of operating an FM receiver, comprising:
- receiving an FM signal
- generating an RSSI and an FM modulated signal in response to the FM signal;
- generating a MPX signal in response to the FM modulated signal and amplifying a peak of the MPX signal in response to the RSSI;
- and
- receiving the MPX signal and generating an audio signal in response to the peak.
Dependencies are inferred from the claim text.