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| Number | Title | Issue Date |
| 7333314 | Power controller, power control method, information processor, and power control program A power control unit that can perform preventing a secondary battery from generating heat and preventing power supply from being suddenly shut off. Supply of power from a secondary battery to a system unit is controlled by a power control unit. At this time, the pow... | 02/19/2008 |
| 7288940 | Galvanically isolated signal conditioning system A galvanically isolated signal conditioning system includes a signal conditioning circuit on an integrated circuit chip; a flying capacitor; and a galvanically isolating MEMS switching device on an integrated circuit chip for selectively switching the flying capacit... | 10/30/2007 |
| 7215127 | Detecting fixture and method thereof for detecting capacitors A detecting fixture for detecting a capacitor with leakage current among a capacitor group in parallel connection includes a reference voltage generator, an impedance converter, a comparator and a display unit. Wherein, the reference voltage generator is used for ou... | 05/08/2007 |
| 7126322 | Circuit to characterize matching of energy-storage components A circuit to characterize the matching of energy-storage components is provided. The circuit includes a linear resistor and a power source. The circuit is electrically connected to two serially connected energy-storage elements, for example, a pair of capacitors. Th... | 10/24/2006 |
| 7084638 | Intermediate circuit capacitor short-circuit monitoring The electronic monitoring circuit for monitoring one of a group of series-connected capacitor units in an intermediate circuit in order to detect short-circuiting of one of the capacitor units includes a device for deriving a reference voltage (14) from an in... | 08/01/2006 |
| 6133949 | Measuring circuit For measuring the frequency bandwidth of a signal-processing circuit with minimal external influences, a measuring circuit for a signal-processing circuit (1), arranged on an integrated circuit, for processing at least a picture signal is characterized in... | 10/17/2000 |
| 5483154 | Apparatus for detecting signal frequency and controlling indicating device An apparatus and a method for discriminating the frequency of an input signal and for providing a binary output signal. The binary output signal can be used to control an indicating device and/or other circuitry. A sawtooth wave is started at zero crossin... | 01/09/1996 |
| 4706066 | Switch capacitor D/A converter having a distortion reducing capacitor A D/A converter which converts a one-bit coded signal into an analog signal by means of an integrator comprising an operational amplifier (1) having an output (4) fed back to the inverting input (3) by means of a first capacitor (C1) and a resi... | 11/10/1987 |
| 4667328 | Clocking circuit with back-up clock source A clocking system for providing periodic clocking or timing signals for use in an electronic circuit. The system includes a primary clock source, such as a crystal oscillator, that provides periodic clocking or timing signals at a predetermined frequency,... | 05/19/1987 |
| 4609990 | Frequency measurement system A method of developing a signal representative of the instantaneous frequency of an alternating current signal encompasses first determining the apparent frequency of the signal at the ends of sampling periods (e.g., half cycles). From successively derive... | 09/02/1986 |
| 4563638 | Time selective frequency detection by time selective channel to channel energy comparison A wide band receiver has connected to its input a series of narrow band channels. The incoming signal is processed through these narrow band channels with the greatest energy being produced in the narrow band channel closest to the incoming signal frequen... | 01/07/1986 |
| 4471286 | Closed-loop frequency regulated generator apparatus In a motor-generator set, the frequency of the AC generator outputted voltage is automatically adjusted by field winding regulation of the DC motor, through a closed loop in which a dual-slope converter is charged during a clock-defined time interval in a... | 09/11/1984 |
| 4438392 | Device for sampling and holding the carrier frequency of short duration pulses A device for measuring the frequency of a pulsed carrier signal in which the carrier frequency is situated within the frequency range and to give a continuous signal whose frequency is equal to the measured carrier frequency. A frequency discriminator (3)... | 03/20/1984 |
| 4268480 | Device for measuring a physical operating characteristic of an ozonizer This device for measuring a physical operating characteristic of an ozonizer such as, for example, the ozonization power, the production of ozone or the concentration of ozone in the air, comprises a medium or high-frequency sensor placed in the ozonizati... | 05/19/1981 |
| 4225863 | Simplified system for estimating pulse radar doppler frequency A method for determining doppler frequency by the measurement of the maxi pulse-to-pulse difference over one doppler cycle. A box-carred (sample-and-hold) phase detector's output is differentiated to obtain pulses whose amplitude represents the amplitude... | 09/30/1980 |
| 4222095 | Frequency to voltage converter A circuit is disclosed which is responsive to an applied alternating input signal for producing an analog output signal the magnitude of which is made proportional to the frequency of the input signal. A triggering circuit is provided which produces a tri... | 09/09/1980 |
| 4215315 | Low frequency signal period or ratio (period)-to-voltage converter A converter that provides an analog (voltage) output signal that denotes either the period of an unknown low frequency signal or the ratio between the periods of two unknown low frequency signals is disclosed. The converter includes a ramp generator havin... | 07/29/1980 |
| 4112359 | Frequency transducer circuit with output calibration A frequency transducer circuit for providing a precisely adjusted range of output currents characterized by the combination of a diode pump circuit with a low impedance input circuit including a control transistor with a first variable impedance for deter... | 09/05/1978 |
| 4011502 | Logarithmic ratemeter with bistable signal comparison A logarithmic ratemeter has a plurality of bistable devices each having two inputs the first of which is connected to a common input line for receiving voltage pulses from a detector of atomic particles and the second of which is connected to a secondary ... | 03/08/1977 |
| 4000465 | Digital tachometer A digital tachometer provided with a measuring shaft to be brought into contact with a rotating body to be measured for simultaneous rotation therewith. As the shaft is rotated the number of rotations of the rotating object is digitally indicated and the ... | 12/28/1976 |
| 3968431 | Measuring repetition rate Method and apparatus for measuring the repetition rate of a series of electrical input pulses. An electrical quantity having a predetermined initial value changes at a predetermined rate in response to the presence of an input pulse; a later value of the ... | 07/06/1976 |
| 3961258 | Pulse time interval measuring system A pulse time interval measuring system in which a desired input signal is selected from among a plurality of input signals each consisting of a plurality of pulse signals, and the time interval between predetermined pulse signals in the desired input sign... | 06/01/1976 |
