Common emitter-common base wideband amplifier circuit composed of F733 integrated amplifier

The common-emitter common-base wide-band amplifier circuit composed of the F733 integrated broadband amplifier has small internal feedback, strong amplification capability, and good circuit stability.
It is a commonly used amplifier circuit. ' The
  cascode-common-base broadband amplifier circuit composed of F733 integrated broadband amplifier is shown in the figure.
  Integrating a broadband cascode and common-base integrated circuit and changing the negative feedback resistance of the first-stage differential amplifier can adjust the voltage gain of the entire circuit.
Short-circuit the terminals ⑨ and ④, and the gain can reach 120dB. Short-circuit the terminals ⑩ and ③, and the gain can reach 40dB. If the terminals are not short-circuited, the gain
will be ZOdB.
    The upper frequency limits in the three cases are 40MHz, 90MHz, and 120MHz.