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我在设计基于TRF7970A的收发器,想要使用外部功放提供更大的阅读范围,能否只增加额外的TX电路不改变RX部分呢?

Other Parts Discussed in Thread: TRF7970A

文档中我看到这段:“The TRF7970A can be used in conjunction with an external TX power amplifier or external subcarrier detector for the receiver path. In this case, certain registers must be programmed as shown here:

• Bit B6 of the Regulator and I/O Control register (0x0B) must be set to 1. This setting has two functions: first, to provide a modulated signal for the transmitter if needed, and second, to configure the TRF7970A receiver inputs for an external demodulated subcarrier input. • Bit B3 of the Modulation and SYS_CLK Control register (0x09) must be set to 1 (see Section 6.15.3.2.8). This function configures the ASK/OOK pin for either a digital or analog output (B3 = 0 enables a digital output, B3 = 1 enables an analog output). The design of an external power amplifier requires detailed RF knowledge. There are also readily designed and certified high-power HF reader modules on the market.”

按我的理解 如果Bit B6设置为1,那么不仅需要额外的TX也需要额外的RX处理电路,我比较疑惑能否只增加Tx?

如果都需要,按我的理解我可以直接在TX端口后增加一个PA,在RX端口前增加额外的解调电路,相当于直接向RX端口输入基带信号,其后接在同一个线圈上。这样理解对吗?

如果双方都需要,如果想要简化设计,有没有好用的certified high-power HF reader modules可以推荐一下呢?