buffer amplifier


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buffer amplifier

[¦bəf·ər ′am·plə‚fī·ər]
(electronics)
An amplifier used after an oscillator or other critical stage to isolate it from the effects of load impedance variations in subsequent stages. Also known as buffer; buffer stage.

buffer amplifier

An analog device that is typically used for impedance matching and signal isolation. For example, a sound card typically uses buffer amps at most of its input and output ports.
References in periodicals archive ?
The impedance multiplication circuit, using the unity gain buffer amplifier, is shown in Fig.
National's LMH6560 is a quad, high-speed, closed-loop buffer amplifier with a high slew rate (3100V/us), and low differential phase and gain, which minimize video degradation.
An internal reference buffer amplifier is provided for use with either an internal or external reference.
From its discrete signal path and buffer amplifier to the advanced materials used in its construction, the TA-E1 pre-amplifier maximizes the sound quality of the SACD format.
Intersil Corporation (Nasdaq:ISIL), a world leader in the design and manufacture of high performance analog solutions, today introduced the EL5027, a new low-cost dual buffer amplifier that brings high performance and lower power consumption in thin-film transistor liquid-crystal displays (TFT-LCDs) for portable devices.
The PLL250 series, targeted at the GSM/EDGE basestation market, consists of a voltage controlled oscillator (VCO), PLL synthesizer IC, PLL loop filter, high-isolation SPDT RF switch, two buffer amplifier stages, low-pass filters on all power supply lines, and filters on all PLL IC programming lines.
Key features include a wide RF and local oscillator (LO) frequency range of 400 MHz to 3000 MHz, integrated LO balun and buffer amplifier, integrated quadrature phase splitter, and single +3.
The VCOs are all fundamental frequency sources and all have built-in buffer amplifiers, output filters and are free from sub-harmonics.
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.
The ADRF6801 also includes other value-added features, such as an RF balun, three LDOs (low-dropout regulators), and the necessary baseband buffer amplifiers.