We propose a simple power-efficient sub-1-V fully integrated RF front end (RFE) for 2.4-GHz transceivers. It introduces the following innovations. First, a function-reuse single-MOS digitally controlled oscillator power amplifier (DCO-PA) with full supply utilization improves antenna-to-DCO isolation for better resilience to jammers. Second, a noninverting transmitter (TX) matching transformer with a zero-shifting capacitor suppresses the second-harmonic emission of the DCO-PA and allows a single-pin antenna interface for both TX and receiver (RX) modes eliminating the transmit/receive (T/R) switches in the signal path. Third, a push–pull low-noise amplifier (LNA) reuses the TX matching transformer for passive gain boosting that reduces power consumption. Fabricated in 65-nm CMOS, the RFE occupies merely 0.17 mm2. Through the functional merge of the oscillator and PA, it can transmit 0 dBm at RF, featuring 10.2% power efficiency when delivering the RF power as low as −10 dBm at a 0.3-V supply. Under a 0.5-V supply, the LNA shows 11-dB gain and 6.8-dB noise figure (NF) while consuming 174 $\mu \text{W}$ .

中文翻译：

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使用单 MOS DCO-PA 和推挽式 LNA 的单引脚天线接口射频前端

我们为 2.4-GHz 收发器提出了一种简单、节能的低于 1-V 的完全集成射频前端 (RFE)。它介绍了以下创新。首先，具有完全电源利用率的功能重用单 MOS 数控振荡器功率放大器 (DCO-PA) 改善了天线到 DCO 的隔离，从而更好地抵御干扰。其次，带有零移电容器的同相发射器 (TX) 匹配变压器抑制了 DCO-PA 的二次谐波发射，并允许为 TX 和接收器 (RX) 模式提供单引脚天线接口，从而消除了发射/接收 ( T/R) 在信号路径中切换。第三，推挽式低噪声放大器 (LNA) 重新使用 TX 匹配变压器进行无源增益提升，从而降低功耗。RFE 采用 65 纳米 CMOS 制造，仅占用 0.17 平方毫米。通过振荡器和 PA 的功能合并，它可以在 RF 处传输 0 dBm，在以 0.3V 电源提供低至 -10 dBm 的 RF 功率时具有 10.2% 的功率效率。在 0.5V 电源下，LNA 显示 11dB 增益和 6.8dB 噪声系数 (NF)，同时消耗 174 $\mu \text{W}$ 。