A compact analog baseband circuit for millimeter-wave radar
A compact analog baseband for the millimeter-wave radar receiver is implemented on a 28 nm CMOS(Complementary Metal Oxide Semiconductor)process.The circuit consists of a three-stage programmable gain amplifier which is embedded with DCOC(DC Offset Cancellation)loops and a sixth-order Butterworth low-pass filter,enabling reconfigurable gain and bandwidth.Reusable resistor and capacitor arrays are used in the analog baseband,and transistors operating in the subthreshold region are introduced as active resistors into the DCOC loops,which significantly reduce the chip area.The measurement results show that the analog baseband with an area of 0.01 mm2 provides a gain range of-0.6 to 68.4 dB with a gain step of 5.8 dB,and a bandwidth adjustment range of 500 kHz to 17 MHz.It achieves an output third-order intercept point of 22.4 dBm and consumes a power of 12 mW from a 1.8 V supply voltage.
analog basebandprogrammable gain amplifierlow-pass filterDCOCminiaturization
万方数据
维普
