Power Amplifiers

Vertical architecture gives RF designers an LDMOS alternative
May 8, 2008 5:25 PM, By Ashok Bindra, Editor
As RF power amplifier designers weigh cost, efficiency, linearity, thermal performance and peak power in transistors, HVVi Semiconductors, Inc., is giving engineers a new silicon alternative...

Vertical architecture gives RF designers an LDMOS alternative

Using MCPAs as active combiners for optimizing the 3G transition

Removing the interstage transmit SAW in WCDMA

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Op-Amps

3G GMSK/EDGE power control with enhanced switching transient performance
Modern power amplifier modules for GMSK applications contain fully integrated CMOS power control chip...

Gain and frequency stabilization in polyphase filters with low open-loop gain operational amplifiers
Replacing two separate post-mixer filters with a single polyphase filter¹ has several advantages...

Log-Amps

• Log amps and directional couplers enable VSWR detection
• Calibration and Temperature-Compensation Techniques Using an RMS-Responding RF Detector
• Log-amp performs advanced RF measurements [Part 2]
• Log-amp performs advanced RF controls [Part 1]
• IEEE 802.11 Spectral Measurements Using Vector Signal Analyzers

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• Portable Power Management

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