SI4711-B30-GMR RF/IF and RFID

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RF transmitters are devices designed to convert electrical signal into radio waves, and then transfer them into space. Specifically, the SI4711-B30-GMR is a multi-band radio transmitter IC, which is used in automotive 2.4GHz multimedia applications. It is mostly used in modern car stereo and other entertainment equipment.

The SI4711-B30-GMR is a multi-band transmitter covered by the ISM (industrial, scientific and medical) and SRD (short-range device) frequency bands. It operates using an integrated low power transmitter with frequency bands ranging from 2402 MHz to 2480 MHz. The transmitter is composed of a harmonic mixer with a frequency doubler stage, an RF amplifier, and a harmonic trap.

The transmitter can achieve a low power of up to 8 dBm and a high power of up to 20 dBm with excellent linearity and efficiency. This allows the device to be used in applications including car stereos and entertainment devices. The SI4711-B30-GMR features channel selectivity of more than 50 dB, which enables the IC to perform well in crowded frequency bands.

In addition, the transmitter offers a variety of features that make it a great choice for automotive applications, such as an integrated low-pass filter, low power consumption and high output power, a standby current of 70 µA, a low noise figure and an adjustable input power level. All these features make the SI4711-B30-GMR an ideal IC for use in car stereo and entertainment equipment.

In terms of working principle, the SI4711-B30-GMR has two distinct parts – the harmonic mixer and the RF amplifier. The harmonic mixer generates harmonic waves with a certain frequency range and passes them through a frequency doubler stage. The RF amplifier then converts the harmonic signal into an RF power signal by amplifying it. This amplified signal is then directed to the harmonic trap which completes the process by providing harmonic trap by removing the harmonic content of the signal.

The SI4711-B30-GMR is an ideal choice for automotive 2.4GHz multimedia applications due to its features, like low power consumption, high output power, adjustable input power level, low noise figure, and channel selectivity. With these features along with the low power of up to 8 dBm and a high power of up to 20 dBm, the IC can perform reliably and accurately in crowded frequency bands.

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