2 results about "Wrong frequency" patented technology

A kind of phase detector, phase-locked loop, radio frequency circuit and terminal equipment, it relates to radio frequency technical field, to solve the problem of the deterioration of sweep frequency difference caused by phase detector overflow.Phase detector includes first TDC, second TDC and TDC selection unit, first TDC measures the time difference between reference signal and feedback signal to obtain first phase detection signal, second TDC measures the time difference between reference signal and feedback signal to obtain second phase detection signal, TDC selection unit selects first phase detection signal or second phase detection signal to obtain third phase detection signal, and the third phase detection signal is used to determine the frequency difference information of phase-locked loop.Through TDC selection unit, dynamic switching is made between two TDCs, when one TDC has overflow, the phase detection signal output by the other TDC is selected to generate frequency difference information, and the wrong frequency difference feedback of overflow TDC is discarded, the phase detection operation without overflow is realized, and the problem of the deterioration of sweep frequency difference caused by phase detector overflow is solved.

The invention discloses a verification test method for a UFS command, and the method comprises the following steps: 1) dynamically generating a UFS command which is an operation command set for managing UFS equipment; 2) the sending end adds a CRC check flag bit to the UFS command; (3) a predefined CRC error is injected into the UFS command; 4) setting clock frequency, command response time, data transmission delay parameters and injection error frequency, and sending a UFS command by the sending end; (5) the UFS equipment receives UFS commands with error CRC values, after the commands are received, CRC verification is carried out, and the verification result is that when it is detected that CRC verification fails, error information is recorded; or the report is overtime; 6, the number of test cycles is set, and the error detection capacity of the UFS equipment is analyzed according to the CRC value comparison result and the overtime events. The UFS equipment verification method based on CRC verification is provided, and the data integrity and reliability of the UFS equipment are comprehensively verified.