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| Number | Title | Issue Date |
| 5434575 | Phased array antenna system using polarization phase shifting A circularly polarized phased array antenna system for both reception and transmission applications includes a plurality of planar radiating (or receiving) elements, a switching matrix for each radiating element, a beamforming network and a transmit/recei... | 07/18/1995 |
| 4477811 | Automatic MDS level analyzer An automatic minimum discernible signal level analyzer for evaluating the low signal level detecting capabilities of a pulse-type receiver and including an RF frequency source phase-locked to the radar transmitter frequency and capable of being adjusted i... | 10/16/1984 |
| 4293956 | Double-balanced mixer A double-balanced mixer device including a planar substrate selectively plated on both sides to form certain mixer component parts and including a pair of quarter wavelength narrow strips extending from the component parts which form one of the balanced l... | 10/06/1981 |
| 4114115 | Compandor apparatus Compandor apparatus including a compressor comprised of an operational amplifier having a plurality of gain controlling feedback paths that are respectively responsive to different portions of the input frequency spectrum, and an expandor comprised of an ... | 09/12/1978 |
| 4035736 | FM discriminator having low noise characteristics A low noise discriminator circuit having particular utility for use in determining the spectral purity characteristics of an rf signal source and comprising, in addition to standard discriminator components, a down-locked reference signal source including... | 07/12/1977 |
| 3991322 | Signal delay means using bucket brigade and sample and hold circuits A signal delay apparatus for delaying an information signal and including a bucket brigade device for sampling the signal and time delaying the samples, a sample-and-hold device for sampling and storing the voltage levels of the individual delayed samples... | 11/09/1976 |
| 3983488 | Frequency-modulation demodulator threshold extension device A threshold extension device for use in a frequency modulation demodulator circuit to minimize effects of impulse noise, usually referred to as "clicks", which normaly appear in the demodulated output signal, and including a delay line for delaying the de... | 09/28/1976 |
| 3979679 | FM demodulator having squelch circuit using bucket brigade delay line An improved squelch circuit for FM demodulators including a low pass filter for filtering out-of-band noise from the demodulator output signals, a delay line for time delaying the filtered signals, a gate for selectively passing the filtered demodulated o... | 09/07/1976 |
| 3942116 | Transceiver having improved voice actuated carrier and echo suppression circuit A transceiver comprising a transmit circuit for receiving a transmit audio frequency signal from a voice input transducer and including a delay line for delaying the transmit audio frequency signal, a modulator for converting the delayed transmit audio fr... | 03/02/1976 |
