High-Frequency, Low-Voltage Circuit Technology for VHF Paging Receiver

Satoshi TANAKA  Akishige NAKAJIMA  Jyun-ichi NAKAGAWA  Arata NAKAGOSHI  Yasuo KOMINAMI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E76-A   No.2   pp.156-163
Publication Date: 1993/02/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on High-Speed Analog Circuits and Signal Processing)
RF IC,  paging receiver,  low-voltage Si-bipolar,  

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An RF IC for a 1.1-V VHF paging receiver is developed. In order to reduce the number of components, it employs direct-conversion frequency shift keying (FSK) architecture. The RF IC adopts two new gain control circuits so as to achieve a wide input dynamic range with only a 1.1 V power supply. One is a low-voltage, low-noise, low-distortion RF amplifier and the other is a low-voltage AGC amplifier. By applying these new circuit technologies, the RF IC achieves a voltage gain of 50.5 dB and a noise figure of 4.3 dB with only 2.0 mW power consumption. Overall, the paging receiver achieves a high sensitivity of -130 dBm and low-intermodulation sensitivity of -37 dBm with bit error rate of 310-2. This paper describes the new high-frequency low-voltage circuit technologies applied in the RF IC.