| 摘要 |
A mobile phone radio frequency switching system selects among transmit (TX) and receive (RX) channels for different services (GSM, DCS, PCS) and frequency bands using an integrated circuit with PIN diodes (DPNi) connected to the input / output terminal and lateral PNP control transistors (Qi) with base connected to a control input (Eci) and collector to the diode anodes. |
