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This paper describes the design and test results of a high performance low noise amplifier (LNA) for code division multiple access (CDMA) one chip transceiver integrated circuit (IC). The circuits are implemented in a standard 0.35-um Samsung Si/Ge BiCMOS process. The LNA has 4 step forward gain control of 15.8 dB, 4 dB, -7.5 dB, and -21 dB. The measured performance of the proposed LNA at the maximum...
A highly linear driver amplifier for 900 MHz cellular transmitter IC is presented. The amplifier operates from a 2.7 V to 3.3 V supply. At 2.7 V, ACPR (Adjacent Channel Power Ratio) of transmitter IC is as high as 50 dBc with an output power of 8.7 dBm. The high ACPR of transmitter IC is due to the high linearity of driver amplifier. To improve linearity of driver amplifier, we also investigate the...
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