A 10GS/s 0.13um SiGe Track-and-Hold Amplifier with 38GHz Analog Bandwidth

In this paper, a bipolar track-and-hold amplifier(THA), designed in a 0.13um SiGe technology is presented. A novel output buffer is proposed to enhance the hold-isolation and the bandwidth. The spurious free dynamic range (SFDR) is larger than 53.8dB for 1-3GHz input frequency with a 0.6Vpp input signal. The input bandwidth up to 38GHz is realized with a sampling rate of 10GS/s. The total DC power consumption is 586mW with a supply voltage of -5V. The layout size is 339x210 um
²
. As compared to the advanced silicon-based THAs, this work features high speed, low total harmonic distortion (THD), good linearity and wide bandwidth.