Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 5701588 | Pictorial display apparatus for receivers for implementing the pictorial display In selecting at least one of plural informing mechanisms as a selected informing mechanism, a waveform symbol is displayed on an LCD representing the selected informing mechanism. The waveform symbol expresses the sound pattern for indicating reception of... | 12/23/1997 |
| 5701589 | Method for adjusting reference frequencies in a communication system A method generally improves the frequency accuracy in a communications system without requiring the use of accurate frequency references in all of the stations or types of stations. An accurate frequency reference is utilized in one of the stations or sta... | 12/23/1997 |
| 5701590 | Radio communication system for performing multi-channel access A radio communication system includes a plurality of mobile stations and a base station for selecting a plurality of radio channels whose frequencies are different from each other to perform radio communication with the mobile stations. The base station i... | 12/23/1997 |
| 5701591 | Multi-function interactive communications system with circularly/elliptically polarized signal transmission and reception A communications system that uses electromagnetic waves. The communications system preferably operates in the millimeter-wave frequencies, and provides relatively high signal restoration and isolation. The communications system can use polarization divers... | 12/23/1997 |
| 5701592 | Method and system for desynchronizing overhead messages in a radiocommunication system A method and system for controlling overhead information transmission in a radicommunication system is described. By desynchronizing information trasmitted in two streams on a control channel, loads on the reverse control channel are more evenly distribut... | 12/23/1997 |
| 5701593 | Method and means for the transmitter-side controller operation of a receiver-side device In known processes for controlling a receiver-side appliance, data concerning the identification signal of a program being received are derived automatically from the identification signal transmitted together with the program. The aim of the invention is... | 12/23/1997 |
| 5701594 | Transmitter/receiver for a TDMA system using common IF SAW filter A radio frequency circuit for a TDMA mobile telephone system allows bulky and expensive IF filters to be saved by sharing common filters between transmit and receive channels by automatic switching of bidirectional SAW filters.... | 12/23/1997 |
| 5701595 | Half duplex RF transceiver having low transmit path signal loss A circulator section in a transceiver receives a transmit signal and an antenna signal and provides them respectively to an antenna and to an electronic switch. The electronic switch operates synchronously with the duplex mode of the transceiver to connec... | 12/23/1997 |
| 5701596 | Modular interconnect matrix for matrix connection of a plurality of antennas with a plurality of radio channel units A modular interconnect matrix (200) interconnects a plurality (M) of radio channel units (203) with a plurality (N) of antennas (202). Each radio channel unit (203) is connected to a first connector (222) on a corresponding first switching module (217) ha... | 12/23/1997 |
| 5701597 | Portable electronic device and method for supplying current to different loads According to a first aspect, a portable electronic device has at least two load circuits which are independently powered by different batteries. According to a second aspect, the load circuits are powered by the same battery, but their power lines are bra... | 12/23/1997 |
| 5701598 | Scanning receiver with direct digital frequency synthesis and digital signal processing A high speed scanning radio has conventional RF amplifier, a mixer, a frequency synthesizer for the generation of local oscillator signals, an IF amplifier, a demodulator, and an audio output stage. The receiver includes a memory for storing a plurality o... | 12/23/1997 |
| 5701599 | Broadcast receiving apparatus having selection function of good reception condition in designated program item Whether or not the reception condition of a received broadcast is good is detected by a reception condition detection unit. If it is detected that the reception condition is good, the broadcast content in the good reception condition is displayed on a dis... | 12/23/1997 |
| 5701600 | Radio receiver and method of calibrating same A method of calibrating a radio receiver (100) which has a desired IF center frequency (fo) includes generating and applying to the receiver's demodulator (126) a plurality of reference signals. The demodulated reference signals are used to generate, for ... | 12/23/1997 |
| 5701601 | Receive signal level detection system A superheterodyne receiver is provided in which first and second envelope detectors having a function of regulating the gain and offset voltage are used to detect receive signal levels from first and second intermediate frequency signals. These receive si... | 12/23/1997 |
| 5701602 | Frequency control apparatus for base station in satellite communication system A frequency control apparatus for compensating frequency fluctuation in an input received signal from a satellite station of a satellite communication system, comprises a PLL arrangement for generating a frequency converting signal in response to the freq... | 12/23/1997 |
| 5701603 | Radio apparatus having a plurality of antennas A radio apparatus according to the present invention comprises a plurality of antennas to be selectively connected to a radio circuit, switches capable of grounding a maximum point in the current distribution of a standing wave of each antenna, and a circ... | 12/23/1997 |
