Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7397317 | Quadrature signal generator for tuning phases of all of four generated quadrature signals A quadrature signal generator capable of phase-tuning with respect to all of four generated quadrature signals. The quadrature signal generator includes four phase tuning units each having two input terminals, one receiving a differential signal, the other being gro... | 07/08/2008 |
| 7205857 | Oscillator with quadrature output in a cross-coupled configuration An oscillator that provides a quadrature output and has a cross-coupled configuration is disclosed. The oscillator generates an output signal having a frequency. Two phase shift circuits, or stages, are activated by a control signal to provide phase shifts within th... | 04/17/2007 |
| 7199676 | Frequency adjustment circuit A frequency adjustment circuit that maintains a target frequency even when frequency adjustment data of zapping circuit is changed by an external noise is offered. The frequency adjustment circuit includes a reset signal generation circuit, a frequency adjustment da... | 04/03/2007 |
| 7142596 | Integrated circuit implementation for power and area efficient adaptive equalization Methods, apparatuses, and systems are presented for performing channel equalization involving receiving a signal from a channel associated with inter-s interference (ISI), providing the received signal to an inductor, capacitor, resistance (LCR) network comprising a... | 11/28/2006 |
| 6995625 | Oscillator with quadrature output in a cross-coupled configuration An oscillator that provides a quadrature output and has a cross-coupled configuration is disclosed. The oscillator generates an output signal having a frequency. Two phase shift circuits, or stages, are activated by a control signal to provide phase shifts within th... | 02/07/2006 |
| 6882235 | Highly stable integrated time reference An integrated oscillator that may be used as a time clock includes circuitry that oscillates about an RC time constant, which RC time constant is adjustable to provide a desired frequency of oscillation. More specifically, the oscillator includes a capacitor array t... | 04/19/2005 |
| 6768364 | Quadrature signal generation with phase error correction A quadrature signal generator includes a polyphase filter where four resistive elements and four variable capacitive elements are connected alternately in series to form a loop; and a phase corrector that variably controls the capacitance of the variable capacitive ... | 07/27/2004 |
| 6639479 | Highly stable integrated time reference An integrated oscillator that may be used as a time clock includes circuitry that oscillates about an RC time constant, which RC time constant is adjustable to provide a desired frequency of oscillation. More specifically, the oscillator includes a capaci... | 10/28/2003 |
| 6590464 | Resistor-capacitor oscillator circuit A resistor-capacitor oscillator for receiving a current source, comprising a first switch path and a second switch path that are symmetric and connected in parallel. The first switch path comprises a signal output terminal and a first voltage output termi... | 07/08/2003 |
| 5982248 | Integrated circuit replacement operating clock signal generator having a crystal oscillator An integrated circuit configuration for producing a clock signal includes an integrated inverter connected between an input terminal and an output terminal. A crystal is externally connected to the oscillator circuit. A feedback path of the inverter conta... | 11/09/1999 |
| 5610560 | Oscillator with switched reactive elements A phase-locked-loop circuit includes an oscillator having switched capacitors that are selectively coupled to a positive feedback path of the oscillator in a coarse frequency error correction mode of operation. When the frequency error is small, the circu... | 03/11/1997 |
| 5459438 | Negative feedback frequency stabilized pulse oscillator This invention relates to oscillators employing a primary feedback network and a high pass filter feedback network. The feedback networks are connected between the input and output of a of a high signal gain amplifier system. The primary feedback network ... | 10/17/1995 |
| 4145670 | Multiphase signal oscillator This invention deals with significant innovations on multiphase signal oscillators including quadrature oscillators for the use in frequency shifters, or sequential gating devices for special multichannel sound effects, or three-phase power sources or oth... | 03/20/1979 |
| 3983512 | Current controlled electrical circuits A resonant circuit is provided with a number of phase shift circuits connected in series. A control circuit is connected in series with the phase shift circuits for controlling the direct current flowing through the circuits. One of the phase shift circui... | 09/28/1976 |
