Single-ended CLRC663 RF design

[hengma]

Hi, 

I have a question related to the single-ended CLRC663 RF circuit design. The datasheet mentions that the receiver can be configured in single-end mode by connecting RxN and RxP and setting the quasi differential mode in the rcv_rx_single register. 

May I know how to configure the single-ended mode for TxN and TxP? Can I connect TxN and TxP? If so, is there any register setting for the TxN and TxP?

Thanks,

Heng

[Tomas_Parizek]

Hello hengma,

You should be able to change the phase of the TX signal using the following register. If both signal are in phase (TX1 and TX2). You should be able to connect them and get proper signal and waveform. 

BR

Tomas 

[hengma]

Hi Tomas,

Thanks for your prompt reply.

In order to use a single-ended transmitter solution, shall I configure both Tx1Inv and Tx2Inv to 1 or 0? In this case, both TxN and TxP will deliver a non-inverted or inverted 13.56 MHz carrier, which is in phase. 

Also, may I know the setting of TxEn? Can we define the source of the transmitter using the setting of TxEn?

Thanks,

Heng

[Tomas_Parizek]

Hello @hengma , 

Correct, Once both Tx paths are anabled and they are in phase. The maximum power of the TX driver can be used. 

If only one TX side is enabled (TxEn), the power is reduced by 50%. 

BR

Tomas