SI4731-D62-GMR

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The SI4731-D62-GMR is an RF receiver belonging to the family of RF receivers. This receiver has various special features which make it suitable for many applications. It is a single-chip, low-power FM broadcast receiver IC designed for use in the receive path of FM radios. It provides low-IF and digital processing for excellent station capture immunity, low current consumption, and minimal component form factors. It is designed to be used in automotive entertainment systems, portable digital radios, set-top boxes, and other consumer electronics.

The SI4731-D62-GMR is designed to reduce the receiver power consumption in a highly effective manner, while ensuring a high-sensitivity FM broadcast reception. The main features of the SI4731-D62-GMR are the low current consumption under 25 mA, the low audio distortion, and the low distortion. The receiver also adopts the direct-conversion receiver method, which greatly improves the sensitivity and reduces power consumption.

The operating principle of this receiver is based on two independent conversion paths, the FM baseband and the IF low-pass path. The FM path comprises the FM low-noise amplifier (LNA), the tuneable FM tracking filter, and other active components. The low-IF path includes the mixing block and the active low-pass filter for FM signal demodulation and baseband filtering. The mixing block extracts the low-IF signal. The two paths are separated by a band-pass filter that passes the wanted FM signal from the LNA to the mixers.

The frequency domain RSSI outputs are also available in the SI4731-D62-GMR, as they are one of the main features of this receiver. These outputs are used for station capture and noise rejection. The system integrates a low noise amplifier (LNA), and receive converter blocks for both FM reception and low-IF reception. The tracking coils and capacitors integrated in the LNA are used to reject unwanted frequencies. Additionally, the integrated high-frequency limiter and digital signal processing (DSP) circuits provide for improved signal-to-noise ratio and improved receive sensitivity.

RF receivers, like the SI4731-D62-GMR, are used in various applications that require a low-power, high-sensitivity, and high-performance FM broadcast reception. The integrated signal-to-noise ratio (SNR) and sensitivity of the receiver make it suitable for use in automotive entertainment systems, portable digital radios, set-top boxes, and other consumer electronics. Its integrated RSSI outputs also make it ideal for noise rejection in noisy environments. Finally, the low noise amplifier, low-power consumption, and low distortion characteristics of the receiver make it suitable for use in low-cost mobile devices and other battery-operated products.

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