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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.
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| Number | Title | Issue Date |
| 7579906 | System and method for providing a low power low voltage data detection circuit for RF AM signals in EPC0 compliant RFID tags A system and method is disclosed for demodulating RF amplitude modulated signals in a demodulator circuit of an EPC0 compliant RFID tag. One advantageous embodiment of the invention comprises first and second input ports, a +ve envelope detector circuit for each of ... | 08/25/2009 |
| 7095256 | Low-power wide dynamic range envelope detector system and method An envelope detector system is disclosed for detecting an envelope in a system input signal. The envelope detector system includes an input node for receiving an input voltage signal, a transconducting amplifier for receiving the input voltage signal and producing a... | 08/22/2006 |
| 7010283 | Signal waveform detection circuit A signal waveform detection circuit includes an amplifier circuit and a comparing circuit. The amplifier circuit has differential amplifiers connected in series. Each of the differential amplifiers has a common connection point. The comparing circuit is connected to... | 03/07/2006 |
| 7002394 | Low supply current RMS-to-DC converter An RMS-to-DC converter implements the difference of squares function using two squaring cells operating in opposition to attain a balance. Each of the squaring cells is implemented as a grounded-base transistor and a two-transistor current mirror. The emitter of the... | 02/21/2006 |
| 6911859 | Method and apparatus for conversionless direct detection A conversionless direct detection system for detecting signals having a very large dynamic range, with a virtually unlimited bandwidth utilizes a successive detection approach having successive log amplifier gain stages, with each gain stage involving simultaneous u... | 06/28/2005 |
| 6839389 | Digital quadrature demodulation and decimation without multipliers One embodiment of the present invention includes a gating circuit, a demultiplexer, and an integrator. The gating circuit gates an input sample with a first clock, the input sample being clocked by a sampling clock N times faster than the first clock. The demultiple... | 01/04/2005 |
| 6097247 | Low threshold voltage diode-connected FET A diode device with a low or negligible threshold voltage includes at least one field effect transistor, the gate of the field effect transistor being connected to the drain of the field effect transistor. The threshold voltage of the diode device is appr... | 08/01/2000 |
| 5461305 | Preprocessing circuit for measuring signal envelope flatness degree in a reproducer A signal envelope measurement preprocessing circuit including: input signal adjuster for interdicting a DC component contained in a signal input for measurement of the degree of flatness of an envelope or for passing only frequencies above a predetermined... | 10/24/1995 |
| 4485348 | Full wave envelope detector using current mirrors The fullwave bridge envelope detector comprises first, second, third, and fourth rectifier circuits each of which are coupled to receive first or second alternating input signals which are 180 degrees out of phase. The first and third rectifier circuits e... | 11/27/1984 |
| 4359693 | Full wave amplitude modulation detector circuit A current comparator is supplied with differential currents based upon an amplitude modulated radio frequency carrier. The comparator outputs are summed in a combining stage the output of which will contain a direct current proportional to the average car... | 11/16/1982 |
| 4319195 | Demodulator for amplitude modulated signal having high input impedance A demodulator for demodulating an amplitude modulated signal of a carrier signal. The demodulator provides a high output and is suitable for use in integrated circuitry. An input signal is connected to the base of one transistor of a pair of transistors f... | 03/09/1982 |
| 4318050 | AM Detecting circuit A single-ended push-pull amplifier converts a single-ended input into a balanced signal which, after amplification, is fed to the bases of alternately operating transistors, and the resulting inverted, or out-of-phase output currents of the inverting tran... | 03/02/1982 |
| 4259641 | Linearized detector/rectifier circuit Circuit for use in the rectification and detection of alternating electrical signals. The circuit employs a feedback amplifier in combination with a non-linear rectifier element to provide an output signal which has a linear relationship to the input sign... | 03/31/1981 |
| 4258327 | Detector circuit with integrating feedback means An envelope detecting circuit capacitively connected to a signal source and arranged to counteract the effect of d-c potential shifts at the interconnection of capacitor and detector. A portion of the detected signal is integrated to provide a signal prop... | 03/24/1981 |
| 4250457 | Full wave rectifier envelope detector A detector is described for fully rectifying a low level A.C. input signal without developing switching transients or substantial levels of undesirable signal components. The output of the detector is substantially equal to the square root of the sum of t... | 02/10/1981 |
| 4201946 | AM-FM Detector circuit stabilized against fabrication and temperature variations A detector circuit for detecting AM and FM signals adapted particularly for integrated circuit fabrication which has a circuit configuration that provides highly stable operating characteristics for both AM and FM operation and is responsive to an increas... | 05/06/1980 |
| 4158882 | Full-wave rectifier circuit A full-wave rectifier circuit useful in a low level envelope type video detector or the like comprises a symmetrical network having a pair of input terminals and an output terminal, the output terminal developing a unidirectional flow of current in respon... | 06/19/1979 |
| 3999138 | Detector for AM-FM signals A detector for AM or FM signals is described. The detector employs a differentially connected emitter follower pair to which an in-phase and a phase-shifted signal are respectively applied. The emitter follower pair produces an output waveform with contro... | 12/21/1976 |
| 3986146 | Double balanced modulator-demodulator A double balanced modulator-demodulator which includes an input transformer with a secondary winding including two sections and an output transformer including a primary section connected in parallel with said secondary winding and an output winding coupl... | 10/12/1976 |
| 3965435 | Circuit for demodulating an amplitude modulated signal A common emitter differential amplifier is arranged to receive an amplitude modulated high frequency signal and demodulate it. The common emitter differential amplifier has the emitters of two transistors connected together and these emitters are then con... | 06/22/1976 |
