U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 6368227

Method of swinging on a swing

A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 381/3 - FM final modulation


Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter where stereophonic signals are broadcast
No. of applications: 18
Last issue date: 10/06/2011


Application No.Application TitleIssue Date
20110243333BTSC ENCODER
The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filte...
10/06/2011
20110194699METHOD AND SYSTEM FOR ENHANCED SOUND QUALITY FOR STEREO AUDIO
Aspects of a method and system for enhanced sound quality for stereo audio are provided. In this regard, levels of audio signals received via an FM radio channel may be controlled based on a signal-to-noise ratio (SNR) of the RF channel. The SNR of the FM radio channel ...
08/11/2011
20110170698FREQUENCY MODULATOR AND FM TRANSMISSION CIRCUIT USING THE SAME
An input signal is input via a first resistor to an inverting input terminal of an operational amplifier. A second resistor is provided on a feedback path between an output terminal and the inverting input terminal of the operational amplifier. A control voltage Vcnt ou...
07/14/2011
20110043367INTELLIGENT NOTIFICATION APPLIANCE CIRCUIT AND SYSTEM
An intelligent notification appliance circuit has a controller and one or more addressable notification appliances coupled with a single pair of wires. The controller outputs integrated power, audio and control signals, and transmits the integrated signals to the one or...
02/24/2011
20100177902Audio transmission system
An audio transmission system of an FM carrier frequency signal conveys an analog audio signal with minimum distortion, high signal to noise ratio, and minimum phase distortion. The system employs digital data processing blocks to generate a VHF FM carrier signal which i...
07/15/2010
20090268916FM TRANSMITTER
An FM transmitter improved in degree of freedom of selecting components. The FM transmitter comprises an oscillator 72 connected to a crystal oscillator 70, a clock generating circuit 50 for generating a clock signal having a frequency which is an i...
10/29/2009
20090225990CLOCK GENERATING CIRCUIT AND AUDIO SYSTEM
A clock generating circuit having a simple constitution and an audio system are disclosed.

The clock generating circuit (300) comprises an oscillator (12) for generating a reference frequency signal by means of a crystal oscil...

09/10/2009
20090028346FM stereo transmitter and a digitized frequency modulation stereo multiplexing circuit thereof
A digitized FM (frequency modulation) stereo multiplexing circuit for an FM stereo transmitter has a digital audio I/O interface, a digitized FM stereo multiplexing circuit, a low-pass filter and an FM circuit. When a digital audio data is inputted, a digital audio deco...
01/29/2009
20090002198Marine throttle mounted stereo control
A marine throttle mounted stereo control system consisting of a throttle mounting base having a control shaft pivotally mounted to the mounting base, which is mounted adjacent an operators seat within a boat cockpit. The throttle control has a stereo control which is re...
01/01/2009
20080285761FILTER CIRCUIT
A pre-emphasis filter emphasizes a high-frequency component of an input audio signal. A limiter circuit detects that the output signal from the pre-emphasis filter reaches a predetermined upper limit level. A filter adjusting circuit changes the frequency characteristic...
11/20/2008
20080260165DIGITAL MODULATOR AND DIGITAL MODULATING METHOD
A digital modulator performs BPSK on differential data, filters it, and outputs the resultant data. A determining unit determines a combination of continuous two values of differential data. In a waveform generator, waveform generation rules are set for each of the comb...
10/23/2008
20080187141Method of transmitting vocal and musical signals via 2.4 GHz or higher wireless communication
A method of transmitting vocal/musical signal via 2.4 GHz or higher wireless communication includes the steps of collecting a vocal/musical signal from a microphone/musical instrument; modulating the vocal/musical signal via 2.4 GHz or higher band as radio frequency to ...
08/07/2008
20080013743STEREO DECODING SYSTEM CAPABLE OF REDUCING THE PHASE SHIFT DURING THE SIGNAL TRANSFORMING
A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot sig...
01/17/2008
20070237333FM transmitter using switched capacitor filter
The FM transmitter converts an input audio signal to a stereo composite signal, frequency-modulates the stereo composite signal and outputs the obtained signal. A stereo modulator stereo-modulates the output signal of the filter circuit, and converts the signal to the s...
10/11/2007
20070211903Decimator And Decimating Method For Multi-Channel Audio
A decimator is used to process a multi-channel audio signal, and includes a memory, a controller and a processing unit. The processing unit is used to decimate each input audio component of a multi-channel audio signal to generate corresponding multi-channel operational...
09/13/2007
20070203596FM TRANSMISSION
An integrated circuit chip is described. The integrated circuit chip includes an audio input section for accepting audio signal, a digital signal processing section for processing the audio signal to perform audio encoding and frequency modulating, a frequency modulatio...
08/30/2007
20070195961FM transmitter
A stereo modulator converts an inputted audio signal to a stereo composite signal. A frequency modulator, which includes a PLL circuit, performs frequency modulation with the stereo composite signal outputted from the stereo modulator as being a modulation signal. A fir...
08/23/2007
20060078128Receiver
The invention refers to a method for a receiver (1) having a signal path (3) incorporating a tuner (4), a frequency demodulator circuit (5) for supplying an analog stereo multiplex signal comprising a baseband stereo sum signal, a 19 kHz ster...
04/13/2006
 
Sign InRegister
Username  
Password   
forgot password?