We present the design of a broadband amplifier to be integrated in a cell impedance measurement system for carrying out impedance measurements in the frequency range of 30-50 GHz. The amplifier is designed in a 130 nm SiGe:C HBT with a maximum transit frequency of 250 GHz and a maximum oscillation frequency of 300 GHz. To attain the wide frequency range of operation, the proposed design features two Cherry-Hooper gain stages, followed by two pairs of cascaded emitter followers as output buffer. Simulations show that the amplifier provides a gain of 20 dB in 30-44 GHz range with a band pass upper cut frequency of 50 GHz, and consumes a DC power of 125.1 mW operating at a supply voltage of 3.3 V. Index Terms – Broadband amplifier, Cherry Hopper Amplifier.
