RF Power Amplifier PA15W
. PA15W – 15 W Power Amplifier Module
1. Overview
The PA15W RF power amplifier comes in a very compact broadband module capable of
delivering up to 15 Watts RMS into a 50-ohm load. It has a 3 dB bandwidth from 4 MHz to 100
MHz. The rise and fall time of the power amplifier for the RF pulse output is typically around 200
ns. The PA15W has standard female SMA jack connectors for RF input and output, and screw
terminal connectors for DC input power.
The product comes with blanking circuitry – the blanking circuitry keeps the PA15W blanked
turned off) until a TTL input logical high) is applied. The blanking circuitry helps to conserve
power, keeps the amplifier cool under typical operating conditions, and provides noise reduction
during the reception of NMR signals. To deblank the power amplifier, a TTL pulse needs to be
applied to the control circuitry at least 15 μs prior to the RF pulse being applied at the input.
The PA15W module measures 2.5" x 2.25" x 2.5" 64 x 57 x 64 mm). There are multiple
packaging options available, such as enclosures with integrated AC power supplies and complete
mobile NMR, NQR and MRI systems that include preamplifiers, filters and SpinCore's
RadioProcessorUSB board along with the PA15W. See the “Packaging Options” section later in this
document for more information. The use of a low pass or band pass) filter at the output of the
PA15W is recommended to reduce high frequency noise and improve performance.
http://www.spincore.com 5 2020-02-20
