Abstract—This paper microwave integrated-circuit quarter-wave-length phase shifter employs 3-dB 90 branch-line transmission lines. present a new analog quarter-wave-length has only one-half as analog
我看手册，最快应该是cpu频率的一半，36Mhz，手册内容如下：Select the BR[2:0] bits to define the serial clock baud rate (see SPI_CR1 register).Bits 5:3 BR[2:0]: Baud rate control000: fPCLK/2001: fPCLK/4010: fPCLK/8011: fPCLK/16
FPGA/CPLD
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