A Beam-Forming Track and Hold Amplifier

Konferenz: ANALOG 2020 - 17. ITG/GMM-Fachtagung
28.09.2020 - 30.09.2020 in online

Tagungsband: ITG-Fb. 293 Analog 2020

Seiten: 5Sprache: EnglischTyp: PDF

Wittenhagen, Enne; Runge, Marcel; Gerfers, Friedel (Chair Mixed Signal Circuit Design, Technische Universität Berlin, Germany)

This paper proposes a novel sampler that performs beam-forming by combining the RX channels in the analog domain. Therefore, several parts from the traditional receiver chain are combined into one beam-forming track and hold amplifier to reduce the overall power consumption and complexity. It directly integrates a true time delay with a phase correct summation unit. The proposed circuit is designed for two RX channels and includes the sampling capacitance of the following time interleaved (TI) analog-to-digital converter (ADC). An overall linearity of 56 dBc together with a signal-to-noise ratio (SNR) above 52.8 dB at 6 GS/s (one TI lane) is achieved. The proposed circuit obtains a voltage gain of 3.5 dB.