2results about How to "Reduce circuit area" patented technology

The embodiment of the present application discloses a kind of multiplexer and communication equipment, the multiplexer includes a transmitting port, at least one receiving port, at least one antenna port, filter set and switch.The fixed end of switch is connected with the first TDD filter in filter set, the first free end of switch is connected with the output end of the second TDD filter in filter set, and the second free end of switch is connected with one of receiving port;Transmitting port is connected with the input end of FDD transmitting filter in filter set and the input end of second TDD filter, and the output end of FDD receiving filter in filter set is connected with one of receiving port;The output end of FDD transmitting filter, the input end of FDD receiving filter and the first TDD filter are respectively connected with one of antenna port.Using the embodiment of the present application can improve port multiplexing rate and reduce circuit area under the premise of ensuring the reliable work of FDD and TDD.

This disclosure relates to the field of USB 2.0 protocol implementation, specifically to a state management circuit architecture for a USB device, comprising: a state detection unit, configured to receive and determine a state signal based on a differential signal pair, and determine the target state of the USB based on the state signal; the differential signal pair includes a differential signal D+ and a differential signal D-; the state signal is any one of SE0, J, and K; the target state is any one of a suspended state, a wake-up state, a reset state, a general working state, and a wake-up request state; a high-speed handshake unit, configured to control the USB to perform high-speed handshake detection after the reset state, and to close the high-speed handshake unit after the high-speed handshake detection, so that the USB re-enters the general working state; and a state transition control unit, configured to manage the current state of the USB and transition the current state of the USB to the target state.