SiGe millimeter-wave dynamic frequency divider with enhanced sensitivity incorporating a transimpedance stage

Abstract

Abstract-A Si/SiGe bipolar dynamic frequency divider designed for 77GHz/79GHz automotive radar is presented, which uses a transimpedance amplifier topology to improve sensitivity and operational bandwidth. Capable of operation for input frequencies from 25 GHz up to 93 GHz, the divider consumes only 35 mA at 5 V supply voltage and has a very compact die area of 295 x 475 µm 2 . In addition, measurements show that the divider operates in the full radar frequency band (76 GHz-81 GHz) up to a temperature of 100°C.

Analysis of Input/Output Transfer Characteristic to Transmit Modulated Signals through a Dynamic Frequency Divider

“…Ⅲ. 동적 주파수 분할기 설계 앞 절에서의 주파수 분할기 동작을 검증하기 위하여 1.4 GHz 입력 주파수에 대해 700 MHz 출력을 내는 1/2 주파수 분할기를  m CMOS 모델을 이용하여 설계 하였다 [6], [7] . …”

A 90-nm CMOS 144 GHz Injection Locked Frequency Divider with Inductive Feedback

“…Fig. 1 shows a relation between the operation frequency, locking range, and DC power consumption for recently reported Si-based ILFDs and dynamic FDs that operate at mm-wave bands (static FDs are not included due to lack of sufficient data points at this frequency range) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The plot clearly shows the expected tendency: dynamic FDs show wide locking ranges but only at the expense of huge power dissipation, while ILFD can reach higher frequencies with much smaller DC power although the locking range is limited.…”

“…1. Reported operation frequency range of various Si-based frequency dividers [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. of 1/(2•T D ) at the same location for each stage will result in the divide-by-N function.…”

Millimeter-Wave Si/SiGe HBT Frequency Divider Using Dynamic and Static Division Stages

“…It receives its input signal from the output of the first common-collector stage, improving the isolation between the output and the feedback loop. The use of simple emitter followers was preferred in order to strongly reduce the chip area and the power consumption [3]. Simulation showed that this topology was perfectly adequate in terms of output power, sensitivity and bandwidth of operation, when combined with the transimpedance amplifier stage in the loop.…”