Bizarre Patents
Combination Beverage Container and Spittoon
A combination beverage container and spittoon includes a bottom portion including outer wall and a first inner wall defining a spittoon space.
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| Number | Title | Issue Date |
| 5930687 | Apparatus and method for generating an AM-compatible digital broadcast waveform An apparatus and method for generating a broadcast waveform is provided which, for generating an in-phase component, includes an in-phase digital signal generator; a first filter for filtering the in-phase digital signal; a first digital-to-analog convert... | 07/27/1999 |
| 5924018 | Analog microwave communication system having a microwave hop converted to a new operating frequency and method A converted analog radio (71) is disclosed for converting an analog microwave hop (70) to a new operating frequency. The converted analog radio (71) comprises an analog radio (72) operable to communicate microwave signals at a first frequency, a digital r... | 07/13/1999 |
| 5924024 | Method and circuit for achieving frequency conversion A frequency conversion method and a frequency conversion circuit which enlarge the frequency difference between the upper and lower sidebands of the output signal so as to enable the undesired sideband to be easily eliminated by a filter even in a case wh... | 07/13/1999 |
| 5898913 | Plural band converter A frequency converter employs a balanced bridge mixer of switching elements such as field-effect transistors (FETs) with a local oscillator supplying control signals to gate terminals of the transistors. A carrier at intermediate frequency (IF) or at radi... | 04/27/1999 |
| 5893027 | Fully integrated two-way radio transmitter utilizing current mode transmit buffer and method of using same A wideband fully integrated two-way radio transmitter (100) includes a voltage controlled oscillator (VCO) (101) for providing a voltage at a radio frequency. A divider (103) is used reducing the radio frequency (RF) signal from the VCO to a an intermedia... | 04/06/1999 |
| 5881375 | Paging transmitter having broadband exciter using an intermediate frequency above the transmit frequency The present invention teaches a paging transmitter that has an exciter that upconverts a modulated signal to an intermediate frequency (IF) above that of the transmit frequency. By so doing, the paging transmitter can broadcast a large range of transmit f... | 03/09/1999 |
| 5867535 | Common transmit module for a programmable digital radio A common transmit module of a programmable digital radio has a digital submodule which receives a bit stream and produces a modulated IF signal, and an analog submodule which receives the modulated IF signal and converts the modulated IF signal to a frequ... | 02/02/1999 |
| 5825254 | Frequency converter for outputting a stable frequency by feedback via a phase locked loop A frequency converter capable of providing a highly stable frequency by frequency feedback using a phase locked loop circuit. The frequency converter includes a local oscillator; a frequency converter for mixing an output of the local oscillator and a fee... | 10/20/1998 |
| 5819161 | Two way radio set utilizing a single oscillator A transmitter and a two-way radio set which can be made structurally much simpler and also which can reduce consumption current. A carrier is obtained by frequency-dividing an oscillation signal generated by an oscillator, and the first local signal and t... | 10/06/1998 |
| 5790601 | Low cost very small aperture satellite terminal A remote ground terminal transmitter for transmitting a modulated data signal having a constant envelope amplitude. The remote ground terminal transmitter comprises a source of data signals, a modulator for providing a carrier signal, receiving a data sig... | 08/04/1998 |
| 5790959 | Programmable band select and transfer module for local multipoint distribution service basestation Transmit and receive programmable band select/transfer modules provide low cost means for selecting and translating spectral segments within sectors of a LMDS basestation. The modules are programmable to select spectral segments and translate the frequenc... | 08/04/1998 |
| 5790942 | Frequency modulation radio transmission device A first phase-locked loop (PLL) includes a first integrated voltage-controlled oscillator (VCO) whose output signal has a frequency modulated by an input signal of the device about a multiple of a reference frequency. A second PLL includes a second integr... | 08/04/1998 |
| 5784413 | Direct digital synthesis frequency-agile QPSK modulator A frequency-agile, direct digital synthesis (DDS) modulator includes a double conversion architecture which provides an output signal having a good output spectrum with low spurious signals. The modulator is particularly suitable for providing a quadratur... | 07/21/1998 |
| 5781849 | Spurious signal reduction in RF transmitter integrated circuits A method and system for reducing spurious signal content in transmitters is described. A lowpass or bandpass filter can be inserted after an input signal node of a transmitter to remove interfering signals generated, for example, from another input signal... | 07/14/1998 |
| 5771442 | Dual mode transmitter In a dual mode transmitter for modulating, in a digital mode, an input digital signal and transmitting a modulated digital signal and modulating, in an analog mode, an input analog signal and transmitting a modulated analog signal, a digital modulating se... | 06/23/1998 |
| 5732330 | Dual band transceiver A dual band transceiver for operating in a first lower frequency band such as the band allocated to cellular systems, and in a second higher frequency band such as the band allocated to personal communication services (PCS) systems. In a representative em... | 03/24/1998 |
| 5717719 | Digital radio transmission-reception apparatus A transmission-reception apparatus in a digital radio communication system for minimizing electrical interference within the apparatus by eliminating interference attributable to the use of different frequency generators. The transmission apparatus includ... | 02/10/1998 |
| 5648985 | Universal radio architecture for low-tier personal communication system An integrated circuit chip set is provided for use in a radio communication system in which a modulated digital input signal is processed for transmission and a modulated signal received from an antenna is processed to provide an output signal, wherein th... | 07/15/1997 |
| 5584066 | Correcting circuit for mixing circuit receiver using same and frequency spectrum inverting circuit using same A double superheterodyne receiver comprising a pair of first mixer circuits, a pair of second mixer circuits, a demodulator circuit, and a pair of detector circuits. The first mixer circuits are connected in an orthogonal relation to each other and acts t... | 12/10/1996 |
| 5559809 | Transmit block up-converter for very small aperture terminal remote station A transmit block up-converter is provided for processing a multiplexed signal including a transmit IF signal, a reference frequency signal, a switching signal, a level signal and a constant-current signal, which is provided through one transmitting line f... | 09/24/1996 |
| 5535247 | Frequency modifier for a transmitter A transmitter has an oscillator (101, 201, 303, 401, 501) that operates at frequency k multiplied by fc, thus the oscillator (101, 201, 303, 401, 501) outputs a signal at an output frequency, kfc. Coupled to the oscillator (101, 201,... | 07/09/1996 |
| 5519732 | Digital baseband to IF conversion in cellular base stations A system and method for converting and combining multiple digital baseband signals into a composite IF signal for subsequent up converting and transmitting as an RF signal. The system and method use distributed symmetrical circuit architecture to form a c... | 05/21/1996 |
| 5515014 | Interface between SAW filter and Gilbert cell mixer The invention concerns multipliers used to modulate a carrier by a signal. The signal is delivered by a Surface Acoustic Wave (SAW) filter, which requires a load impedance of low value, in the range of tens of ohms, and almost certainly less than 200 ohms... | 05/07/1996 |
| 5450043 | Quadrature modulator with distortion compensation A quadrature modulator multiplies two carriers which are 90° out of phase with each other by a sine component and a cosine component of a baseband signal, respectively, adds the product signals to each other, and amplifies the sum signal to produce a qua... | 09/12/1995 |
| 5418818 | Digital signal processor exciter A digital exciter (30) for selectively modulating digital or analog input data. The digital exciter includes a digital signal modulator (32) and a digital quadrature modulator (DQM)(36) comprising two digital signal processors (DSPs). The signal modulator... | 05/23/1995 |
| 5410747 | Dual conversion transmitter A transmitter using a dual conversion system which effects frequency conversion twice has a local oscillator (113) for generating a first local oscillation signal, a multiplier (118) for multiplying the frequency of the first local oscillation signal to p... | 04/25/1995 |
| 5337005 | Integrated frequency synthesizer circuit for transmit-and-receiver operation An integrated circuit includes first and second oscillators. A controllable switch has a signal input connected to a signal output of the second oscillator. A modulator has two signal inputs each being coupled to a signal output of a respective one of the... | 08/09/1994 |
| 5301361 | Low parts count transmitter unit A frequency modulated (FM) transmitter for use in the 100 to 300 megacycle band is described having a low parts count topology. The disclosed topology requires the use of five tank circuits tuned to various frequency multiples of a crystal oscillator to a... | 04/05/1994 |
| 5223801 | Crystal oscillator and transmitter operating at the third harmonic of the fifth overtone of a crystal An improved short distance, battery powered, amplitude modulated RF transmitter for transmitting encoded security data. An oscillator stage provides a control crystal and filter which are feedback coupled between the emitter and base of a transistor to os... | 06/29/1993 |
| 5220680 | Frequency signal generator apparatus and method for simulating interference in mobile communication systems This invention is a multiple-frequency signal generator apparatus and method primarily for simulating a cell site interference environment for electromagnetic communications systems. The generator can produce a plurality of frequencies having a frequency-... | 06/15/1993 |
| 5129100 | Agile output band pass filter for agile up converter The need for replacing the dedicated external output filter each time a different channel is selected is eliminated through the use of a switchable array of low and high pass filters which forms a filter circuit which may be varied for use with any channe... | 07/07/1992 |
| 5101418 | Digital time-multiplexed quadrature frequency upconverter A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to a storage for the baseband functions. The baseband processor is direct access coupled to a modem pro... | 03/31/1992 |
| 5038404 | Low phase noise agile up converter The converter has two mixer stages each including a phase locked loop with an oscillator controlled by a phase comparator. The frequency reference to both stages is provided by a single master reference. The frequency of the oscillator in the first stage ... | 08/06/1991 |
| 5020079 | Apparatus for generating a minimum-shift-keying signal Apparatus for generating an MSK signal by using a dual modulus frequency divider which divides an incoming digital clock signal of frequency f0 by the factors n and (n+1) in dependence on the data type of the data to be transmitted and in which... | 05/28/1991 |
| 5010585 | Digital data and analog radio frequency transmitter A digital Non Return to Zero (NRZ) and Frequency Modulated (FM) radio transmitter intended but not unique to, for the transmission of Digital, Tone Only or Tone and Voice paging messages is described. This transmitter is built on the concept that the sepa... | 04/23/1991 |
| 5001773 | Local oscillator feedthru cancellation circuit Method and apparatus are disclosed for canceling local oscillator feed thru in an IF transmission circuit. The apparatus includes first and second mixers for receiving LO and IF signals. The mixers are operable to upconvert the IF signal while passing an ... | 03/19/1991 |
| 4864636 | Crystal controlled transmitter A short distance, battery powered, amplitude modulated, crystal controlled RF transmitter for transmitting encoded security information. In its preferred embodiments, the transmitter comprises a novel fifth overtone crystal oscillator which self-produces ... | 09/05/1989 |
| 4850035 | Method and apparatus for regulating a single sideband up converter To regulate a single sideband up converter having a pair of mixer stages (M1, M2), each mixer stage receives control signals to compensate for spurious signals of the mixer components. Part of the radio frequency output signal (RF') from the converter is ... | 07/18/1989 |
| 4792985 | Transmitters and systems for tone-in-band transmission In those transparent tone-in-band systems which employ a single oscillator in the transmitter to generate a frequency notch between upper and lower portions of a band which is to be transmitted, there is not complete freedom to choose the width of the not... | 12/20/1988 |
| 4713691 | Interface circuit of video signal hard copy apparatus An interface circuit of video signal hard copy apparatus for optimizing a phase of a sampling clock to an image signal. A delayed signal of a video sync signal is employed for a reference input signal of a sampling clock generation circuit. The delay quan... | 12/15/1987 |
