Abstract: A high input impedance AC buffer for use in an instrument that does not require high frequency compensation or calibration. An op-amp receives an input signal that is to be measured via a high resistance input resistor and produces an output signal proportional to the input signal. A feedback resistor block and a feedback attenuator form the feedback path of the buffer and establish buffer gain. The low resistances of the feedback block and the feedback attenuator are substantially less than the resistance of the high resistance input resistor, precluding the need for compensation and calibration capacitors. A switching circuit operates to select resistors in the feedback resistance block and the feedback attenuator to provide predetermined gains for the buffer.

Abstract: Structure for isolating a kennel run from wash water and other waste from an adjacent run. An upwardly opening channel is sealed to the floor between the runs, and a partition is supported directly above this channel with its lower edge essentially in the channel, so that waste cannot pass above or below the channel, and so that the waste runs from the partition into the channel.