Abstract: A digital peak detector formed of a plurality of comparators for outputting signals which, in combination, can form a thermometer code signal, apparatus for distributing an analog input signal to an input of each of the comparators, a plurality of digital to analog converters (DACs), apparatus for providing an output signal of each DAC to another input of a corresponding comparator, and apparatus for applying a digital signal to an input of each DAC to establish a comparison level against which a corresponding DAC can determine an output signal level.

Abstract: A microwave frequency detection receiver utilizing a prescaler comprised of one or a plurality of cascaded analog frequency dividers for down-converting received microwave signals to a predetermined compressed radio frequency bandwidth, connected to a combined frequency discriminator and quantizer processor. The frequency discriminator can be either a single or multiple delay line discriminator or a two-stage feed forward digital instantaneous frequency measurement device. The receiver is characterized by wide radio frequency input bandwidth as well as accurate frequency measurement capability on short single pulse signals. Delay line discriminators can operate with high data rates and in a dense signal environment with a high probability of accurate signal frequency detection and measurement, and are thus suitable for use in electronic warfare systems.

Abstract: A method and apparatus for performing simultaneous instantaneous signal frequency measurement using a signal sorter in conjunction with a frequency measurement receiver. Simultaneous signals of similar amplitude are received and successively applied to a plurality of either frequency or time dependent signal modifying circuits, via switching circuitry. Respective ones of the received signals are separated with respect to frequency in one or both of amplitude and time from one another via the signal modifying circuits which can be, for instance low pass and high pass filters, or positive and negative dispersive delay lines. In addition, the received signals are applied to a straight-through signal path for transmitting the signals to the frequency measurement receiver unaltered. Signals output from the signal modifying circuits and the straight-through signal path are successively applied to the frequency measurement receiver for detecting the frequency of respective ones of the separated received signals.

Abstract: A compact reverse-osmosis water purifier especially adapted for use in the household on a counter-top, with an easy-to-operate diverter valve to connect the purifier to a water faucet and sink. A battery-operated pump is provided to dispense water from a storage reservoir. This reduces the size of the purifier unit while maximizing the height from the dispensing spout to the counter-top to accommodate relatively tall vessels for receiving the dispensed water. An automatic conductivity test device causes a red or a green lamp to be lit each time a button is pressed to dispense water, the green lamp indicating that the water is of sufficient purity, and the red lamp indicating that it is not, or that the device is malfunctioning or requires flush cleaning. The diverter valve can be operated to selectively pass water through the faucet in the usual way, or to feed water to the purifier.