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One method of dealing with this relatively low impedance is to use a near unity gain buffer amplifier to increase the effective equivalent impedance of the detector.

Each die integrates a three or four stage RF amplifier, a balanced mixer optimized for up or down conversion, a tripler followed by a high pass integrated filter and a buffer amplifier.

A versatile new three-stage buffer amplifier has been introduced that is idea for use as a receiver front end low noise amplifier, but, as a result of its dual bias configurations, it can also be used as a driver amplifier or LO buffer with good linearity and higher gain.

Mimix Broadband was highlighting a 16 to 30 GHz GaAs MMIC three-stage buffer amplifier that can be operated with all three stages biased in parallel, or with independent bias for the input and output stages.

The model 22TRX0175 is a gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) sub-harmonically pumped transmitter, which integrates an image reject sub-harmonic anti-parallel diode mixer followed by a balanced two-stage output amplifier and includes an integrated LO buffer amplifier. The image reject mixer eliminates the need for an image bandpass filter after the output amplifier to remove thermal noise at the image frequency.

The model XB1003 is a gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) three-stage buffer amplifier. It operates with all three stages biased in parallel, or with independent bias for input and output stages as required to optimize performance.

The role of the local oscillator buffer amplifier noise in a base station IC mixer design specification has been discussed in this article.

The RF2860 broadband front end receiver for CDMA PCS applications is a low cost, highly integrated transmit local oscillator buffer amplifier. The RF2860 is designed to optimize board space in CDMA handsets.

Intersil's portfolio includes gamma buffer amplifiers, integrated common voltage (VCOM) amplifiers, gamma reference generators, white LED drivers and multi-channel DC:DC regulators.

These devices are targeted to be used as low noise amplifiers (LNA), driver amplifiers, buffer amplifiers and RF transistors for voltage controlled oscillators (VCO).

With an operating range of 700MHz-2000MHz, the RF2451 is suited for applications such as CDMA handsets, GSM handsets, IF or RF buffer amplifiers, oscillator loop amplifiers or as a driver stage for power amplifiers.