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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7362814 | Memoryless spectrum correction algorithm for non-ideal I/Q demodulators An algorithm for correcting the output of an analog I/Q demodulator without the need for calibration or storing state information. The output of the analog I/Q demodulator is digitized, and the discrete-time samples are divided into segments. A digital frequency tra... | 04/22/2008 |
| 7190733 | Memoryless spectrum correction algorithm for non-ideal I/Q demodulators An algorithm for correcting the output of an analog I/Q demodulator without the need for calibration or storing state information. The output of the analog I/Q demodulator is digitized, and the discrete-time samples are divided into segments. A digital frequency tra... | 03/13/2007 |
| 6400774 | Nonlinearity-caused distortion compensating system A radio transmitter has a quadrature modulating portion and an RF power amplifier. The RF power amplifier follows the quadrature modulating portion. A nonlinearity-caused distortion compensating system provided in the radio transmitter includes a power ca... | 06/04/2002 |
| 6295015 | Reference generator for demodulator calibration A reference generator includes a memory that stores reference data which, when clocked out of the memory, produces an ATSC compliant VSB reference signal substantially free of sub-harmonics of the clock signal. A digital-to-analog converter converts the c... | 09/25/2001 |
| 6169585 | Circuit arrangement for demodulating an intermediate-frequency video signal In a circuit arrangement for demodulating an intermediate-frequency video signal generated while using a Nyquist edge, having a phase-locked loop (1) including a phase detector (3), a loop filter (4) and a voltage-controlled oscillator (5), and a video de... | 01/02/2001 |
| 6166594 | Self calibrating demodulator system A reference signal source produces a substantially distortion free reference signal which is supplied to a demodulator that is arranged to demodulate the substantially distortion free reference signal. A calibration filter and an equalizer are included do... | 12/26/2000 |
| 5029271 | Superregenerative detector An improved superregenerative detector including input elements for receiving a high frequency carrier signal having an amplitude envelope upon which an information signal is impressed, the detector also including a first and a second oscillator and outpu... | 07/02/1991 |
| 4631487 | Phase lock loop television signal demodulator A phase lock loop demodulator has its loop amplifier and filter designed such that the transfer function of the amplifier and filter is optimized for the presence of sound and color subcarriers. An equalizer circuit is included in the demodulator for equa... | 12/23/1986 |
| 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 |
| 4000472 | Amplitude modulation envelope detector with temperature compensation An amplitude modulation envelope detector comprised of a basic voltage doubler envelope detector whose linear dynamic range is increased by a forward bias network and for which the offset voltage is stabilized by temperature drift compensation provided by... | 12/28/1976 |
