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| Number | Title | Issue Date |
| 7274236 | Variable delay line with multiple hierarchy Disclosed herein are improved, simplified designs for a hierarchical delay line (HDL). The HDL is useful in providing precise phase control between an input clock signal and an output clock signal, and has particular utility as the variable delay in a delay-locked l... | 09/25/2007 |
| 7271579 | AC signal level detection circuit An AC voltage generated by an AC power source 1 is rectified by a full-wave rectifying circuit 2, which generates a rectified voltage. An internal regulator 33 performs waveform shaping of the rectified voltage. A comparator 42 compares t... | 09/18/2007 |
| 6690210 | Transmitting device A transmitting device generates a modulation signal depending on data to be transmitted. The transmitting device includes a transmission frequency generation device that is controlled depending on the signal in order to produce a transmission frequency co... | 02/10/2004 |
| 6566907 | Unclocked digital sequencer circuit with flexibly ordered output signal edges An unclocked, digital sequencer circuit having flexibly ordered leading and trailing edges on the output signals. The sequencer circuit of the invention includes a dual-input latch that detects only leading edges on a first input terminal and only trailin... | 05/20/2003 |
| 6225832 | Signal regeneration circuit The signal regeneration circuit recovers a digital signal from an input signal that is supplied via metallic isolation (galvanic separation). The circuit has two input terminals for the input signal and one output terminal for the recovered digital signal... | 05/01/2001 |
| 5519343 | Two channel direct digital synthesizer with waveform memory interleaving circuit A two channel direct digital synthesis circuit employing a waveform interleaving circuit is provided. A clock having first and second states controls the overall operation of the memory interleave operation. A phase accumulator is incremented by a phase i... | 05/21/1996 |
| 4698528 | Edge detection using dual trans-impedance amplifier A current pulse signal, which is generated by an optical detector, is fed to an input of an edge detector circuit. The current pulse signal is converted into a differentiated voltage pulse signal having a negative going pulse corresponding to a positive g... | 10/06/1987 |
| 4583008 | Retriggerable edge detector for edge-actuated internally clocked parts A retriggerable edge detector is provided having a means for receiving digital input signals, at least two signal transmitting paths connected to that signal receiving means, one of which paths transmits the input signal with predetermined delay, output g... | 04/15/1986 |
| 4543530 | Methods of and means for determining the time-center of pulses A pulse position detector responding to the leading and trailing edges of a pulse at a point where it crosses a threshold level. Responsive to the leading edge, a capacitor begins to charge with a characteristic which is represented by a slope of a first ... | 09/24/1985 |
| 4468705 | Data transition enhancement A data enhancement circuit for a facsimile receiver is provided. The circuit includes positive and negative slope detectors as well as a signal threshold detector. Incoming signals above the signal threshold and having a positive slope are considered blac... | 08/28/1984 |
| 4403193 | Pulse detection circuit A pulse detection circuit, for detecting pulses contained in output signals derived from an encoder such as rotary encoder which converts any physical quantity like spatial position, displacement or length into an electric signal, is disclosed. The disclo... | 09/06/1983 |
| 4388582 | Apparatus and method for charging batteries A method and apparatus are presented for charging batteries at a high rate without damaging or reducing the life of the battery. The method comprises monitoring the level of energy stored in the battery, preferably by monitoring a particular battery chara... | 06/14/1983 |
| 4337434 | Compensator for slowly responding sensors A signal compensating network for use with a sensing element having different rates of response for increasing or decreasing sensed quantities includes a differentiating amplifier having different time constants for increasing and decreasing input signals... | 06/29/1982 |
| 4295057 | Dual signal control system An electronic control circuit is provided which operates on selected characteristics of oppositely phased control signals. A logic arrangement sorts out those signal portions having the selected characteristics to provide an output signal.... | 10/13/1981 |
| 4245192 | Periodicity verification circuit A circuit for high speed testing of the periodicity of an alternating signal (60) independently of signal amplitude. A bistable multivibrator (128) changes state in response to each positive slope zero-crossing of the signal and alternately activates each... | 01/13/1981 |
| 4137493 | Battery charge detector and charging system including such detector A detector, intended particularly for detecting end of charge of a secondary battery under constant current charge, includes a linear input stage producing an output voltage linearly related to the battery voltage. A relay contact is closed periodically b... | 01/30/1979 |
| 4135161 | Method and means for pulse detection An improved method and means for pulse detection comprising a pair of comparators with different predetermined reference signals to one of which the input pulse is applied and to the other of which the derivative of the input pulse is applied.A zero-cross... | 01/16/1979 |
| 4132947 | Waveshape detector Circuitry is described for detecting a waveshape having a change of slope, such as the optical signal wave from a nuclear explosion. The wave is amplitude-sampled at a rate determined by a variable frequency clock pulse generator. Signal pulses indicative... | 01/02/1979 |
| 4118661 | Electrical circuit arrangements particularly though not exclusively for electrical battery charging systems The system described is for controlling the "rapid" charging of electric batteries whose voltage-time profile exhibits a peak at or about the point when it is fully charged, and is arranged to curtail the charging when this peak is detected. The system ma... | 10/03/1978 |
| 4079323 | Method and apparatus for coupling a moving-object sensor to direction-sensitive data utilization apparatus An interface logic circuit for supplying direction of passage data to a data utilization apparatus from a moving-object sensor which generates three recognition signals indicative of intrusion of an object into the left end, center, and right end, respect... | 03/14/1978 |
| 3958132 | Slope change detector A slope change detector circuit uses a differential amplifier to produce an output signal having two levels, the change of one to the other of which is indicative of a slope change in an input electrical signal. A first input of the differential amplifier... | 05/18/1976 |
| 3942037 | MOS edge sensing circuit An edge sensing circuit is implemented using MOS logic gates. The edge sense circuit detects either a positive transition or a negative transition of a first input signal, depending on the logic level of a second input signal, if an enable signal logical ... | 03/02/1976 |
