HMC585MS8GE

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RF Mixers

A RF mixer is an active or passive electronic device or component that can be used to either up-convert or down-convert signal frequencies. It is one of the most significant passive or active devices used in various sections of a wireless communication system. Therefore, the performance of the overall communication system is depended on the selection of the RF mixer. The HMC585MS8GE is an important device in the mixer block of a wireless communication system.

The application field of HMC585MS8GE

The HMC585MS8GE is a versatile automatic gain control (AGC) doubler mixers IC from Hittite. This IC can be used for a variety of applications such as Wi-Fi, Wi-MAX, GPS, Zigbee, cordless phones, broadband access, cellular infrastructure, and wide-area applications. Additionally, it can be used in communication systems, instrumentation, broadcast receiver, medical imaging, test & measurement, satellite communications, and wireless control systems.

This device features a very wide dynamic range of 30 dB (typ), and a wide IF bandwidth from DC to 6 GHz with excellent linearity of 22dBm IIP3. The HMC585MS8GE comes in an 8 lead MSOP box, with a unique programmable compressor that has selectable 0 dB and 9dB options.

Working Principle of HMC585MS8GE

The HMC585MS8GE uses a Gilbert Cell which is a type of mixer used in RF circuits. It is an active circuit that is used to modulate or demodulate a signal by combining or mixing it with a high frequency signal. The Gilbert Cell has two input signals and one output signal. The input consists of carrier and signal signals. The signal signal is also an RF signal of a higher frequency than the carrier signal. The Gilbert Cell uses differential amplifiers and resistors connected between two voltage supply rails to produce an output signal which is a combination of the input signals.

When the input signals are mixed, the resulting signal can be either up-converted or down-converted based on the frequencies of the signals. The HMC585MS8GE uses this principle to produce a processed signal from the input signals. The device uses a programmable compressor, with selectable 0dB and 9dB options, to produce more linear output. The HMC585MS8GE is designed to be used in applications which require high linearity, wide dynamic range, and wide IF bandwidth.

Conclusion

The HMC585MS8GE is an important device in the mixer block of a wireless communication system. It can be used for a variety of applications such as Wi-Fi, Wi-Max, GPS, Zigbee, cordless phones, broadband access and much more. The device features a wide dynamic range of 30 dB (typ), and a wide IF bandwidth from DC to 6 GHz with excellent linearity of 22dBm IIP3. Finally, the HMC585MS8GE uses a Gilbert Cell, with differential amplifiers and resistors connected between two voltage supply rails, to produce an output signal which is a combination of the input signals.

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