Enhancement mode PHEMT low noise amplifier with LNA linearity control (IP3) and mitigated bypass switch

A new LNA has been designed using single supply enhancement mode PHEMT process for WCDMA and other wireless application up to 6 GHz. The LNA has direct CMOS logic controllable integrated bypass-mitigated switch and LNA linearity (IP3) control switch. Two different kind of logic controls (0/3 V, 3/0 V) switch has been design for bypass-mitigated switch. In high linearity mode the LNA draws 8.5 mA current and has 15 dB gain, 1 dB noise figure, -6 dBm IP/sub 1dB,/, 7.3 dBm IIP3 with I/O return loss >11 dB. In low linearity mode the LNA draws 3.5 mA current and has 14 dB gain, 1.1 dB noise figure,, -6.5 dBm IP/sub 1dB,/, 2 dBm IIP3 with I/O return loss >11 dB. The LNA bypass-mitigated switch has 11 dB and draws negligible current with 3/0 V logic, /spl sim/200 /spl mu/A for 0/3 V logic. Due to well-behaved match of LNA in High Linearity/Low Linearity/Bypass modes, this LNA has minimum mismatch effect for duplexers; and filters in a receiver system.