docs: def _get_signed_params(conv):
      """
      Fill the sign-dependent params of the conv structure in case of signed 
      conversion
      @param conv: the structure to be filled
      """
      conv["sign_mask"] = 2 ** (conv["bits"] - 1)
      conv["int_min"] = -1 * (2 ** (conv["bits"] - 1 - conv["bin_point"]))
      conv["int_mask"] = sum([2 ** i 
          for i in range(conv["bin_point"], conv["bits"] - 1)])
      conv["int_max"] = sum([2 ** i for i in range(conv["bits"] -
          conv["bin_point"] - 1)])