Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 5357217 | Signals generator having non-overlapping phases and high frequency A signal generator which includes two matched ring oscillators, and feedback gates which cross-couple each ring oscillator to the other. That is, in each oscillator, a first node gates a coupling transistor which connects a second node (complementary to t... | 10/18/1994 |
| 5325074 | Oscillator with supply voltage changeover according to activated and disabled states of a microcomputer A microcomputer in which an oscillating circuit provided therein is activated both when the microcomputer is in an activated state and when it is in a disabled state is provided with a changeover circuit for changing over a supply voltage of the oscillati... | 06/28/1994 |
| 5315166 | Substrate voltage generator and method therefor in a semiconductor device having selectively activated internal stepped-down power supply voltages A semiconductor device having an internal voltage down converter includes a circuit operating with an externally applied power supply voltage, a circuit operating with an external stepped-down voltage as an operation power supply voltage, and substrate vo... | 05/24/1994 |
| 5304859 | Substrate voltage generator and method therefor in a semiconductor device having internal stepped-down power supply voltage A semiconductor device having an internal voltage down converter includes a circuit operating with an externally applied power supply voltage, a circuit operating with an internal stepped-down voltage as an operation power supply voltage, and substrate vo... | 04/19/1994 |
| 5289138 | Apparatus for synchronously selecting different oscillators as system clock source An apparatus is provided for synchronously selecting different oscillators as the system clock source. The apparatus is comprised of two oscillator selectors. Each of the oscillator selectors has as its inputs the output of each of the oscillators and a t... | 02/22/1994 |
| 5254960 | Oscillator circuit capable of removing noise A low frequency oscillator circuit to be integrated in a microcomputer for a low consumption power operation with an improved noise resisting performance. The oscillator circuit includes a high frequency clock generator circuit, a shift register for shift... | 10/19/1993 |
| 5231389 | Display control for selecting oscillating signals A display control apparatus includes a display control block with plural external connector terminals, and an oscillator block including plural oscillators. The external connector terminals are coupled to a selector for selecting one of the terminals in r... | 07/27/1993 |
| 5206769 | Method for controlling a plurality of phase-lock loops from a common frequency control In a magnetic tape readback system for a multi-track tape player, a phase lock loop is provided for each of the channel circuits used for reading signals from the respective tracks on a multi-track tape. A common frequency determining capacitor is coupled... | 04/27/1993 |
| 5185585 | Crystal oscillator and method with amplitude and phase control Crystal oscillator and method which in one embodiment have a crystal element connected in a positive feedback loop with a charge amplifier and an integrator, with the gain of the loop being maintained at a level of unity. Compensation is provided to offse... | 02/09/1993 |
| 5166645 | Differential mixer oscillator A differential mixer oscillator employing two transistors in a differential pair as the sustaining amplifier for a quartz crystal resonator at some first high frequency. The bias current of the differential pair is modulated at a second high frequency der... | 11/24/1992 |
| 5142248 | Plural selectable RF oscillators for supplying capacitive loads An oscillation circuit having multiple separately addressable oscillator stages for applying RF voltage across selected capacitive loads where each stage includes a power driver, a transformer and a quench/clamp circuit. The oscillation circuit includes o... | 08/25/1992 |
| 5138282 | Plural phase-lock loops sharing a common frequency control A magnetic tape readback system is disclosed for a multi-track tape player. A single phase lock loop is provided for the channel circuits used for reading signals from the respective tracks on a multi-track tape. A common frequency determining circuit mea... | 08/11/1992 |
| 5126695 | Semiconductor integrated circuit device operated with an applied voltage lower than required by its clock oscillator A semiconductor integrated circuit device comprises a first oscillator circuit driven by a first voltage for generating a first clock signal employed as the internal system clock signal for an internal circuit in the integrated circuit device and a second... | 06/30/1992 |
| 5097226 | Voltage-boosted phase oscillator for driving a voltage multiplier A voltage-boosted phase oscillator for driving a voltage multiplier comprises two intermeshed ring oscillators, each composed by an odd number of inverters connected in cascade through a closed loop and generating a normal phase and a voltage-boosted phas... | 03/17/1992 |
| 5089793 | Semiconductor device having an oscillatory circuit Disclosed is a semiconductor device in which a CPU and an oscillation circuit are driven with the same driving voltage. The oscillation circuit is constituted by a plurality of oscillation invertors having different characteristics respectively correspond... | 02/18/1992 |
| 5047734 | Linear crystal oscillator with amplitude control and crosstalk cancellation A series-feedback crystal oscillator has a crystal element in series with a buffer amplifier. The oscillator maintains a linear oscillation signal by using an amplitude control circuit to hold the oscillation signal to a certain level at which distortion,... | 09/10/1991 |
| 4996502 | Ultrasonic atomizer circuit having plural oscillators An ultrasonic atomizer circuit having a plurality of unit oscillator circuits has been improved by preventing undesired interference between oscillator circuits. Each unit oscillator circuit has a transistor (Q1) with a grounded collector, a piezo-electri... | 02/26/1991 |
| 4965815 | Phase detection circuit for stepwise measurement of a phase relation In a phase detection circuit for detecting the phase relation between a first (f1) and a second (f2) clock signal in which tappings (b, c, d, e, f, g, h, i) of a delay circuit (7) for the first clock signal are connected to memory el... | 10/23/1990 |
| 4845692 | Clocking device of substantially constant stability for short-term and long-term time measurement A clocking device of substantially constant stability for short-term and long-term measurements. This clocking device comprises first generators of a clocking signal with substantially constant stability for short-term measurements, and second generators ... | 07/04/1989 |
| 4843348 | Monolithically integrable, amplitude-controllable oscillator amplifier circuit A monolithically integrable amplitude-controllable oscillator amplifier circuit includes a differential amplifier. The bases of first, second and third transistors are acted upon by a direct voltage. A first capacitor connects the base of the second trans... | 06/27/1989 |
| 4831339 | Oscillator having low phase noise Phase noise in a carrier signal is reduced by use of a phase locked loop which is responsive to the carrier signal and another signal of comparable noise level but having non-correlated phase noise.... | 05/16/1989 |
| 4791387 | Microwave band frequency synthesizer A microwave band frequency synthesizer comprises first and second phase-locking loops. The first phase-locking loop includes a first voltage controlled oscillator, a variable frequency divider and a first multiplier and generates an output signal whose fr... | 12/13/1988 |
| 4720688 | Frequency synthesizer A microwave frequency synthesizer comprised of a phase-locked loop having a low noise and highly stabilized reference voltage-controlled oscillator and further two phase-locked loops each having a stabilized voltage controlled oscillator, the signal outpu... | 01/19/1988 |
| 4658222 | Radiation detector spectrum simulator A small battery operated nuclear spectrum simulator having a noise source nerates pulses with a Gaussian distribution of amplitudes. A switched dc bias circuit cooperating therewith generates several nominal amplitudes of such pulses and a spectral distri... | 04/14/1987 |
| 4629999 | Phase-locked loop capable of generating a plurality of stable frequency signals A phase-locked loop capable of generating a plurality of stable frequncy signals. This loop includes a plurality of voltage controlled oscillators which are sequentially coupled to the output of a phase sensitive detector by a multiplexer. RF switches the... | 12/16/1986 |
| 4612517 | Signal simulator for magnetic recording head Disclosed is equipment for testing a magnetic recording head; comprising a circuit which generates a test signal simulating what the head under test would generate.... | 09/16/1986 |
| 4575757 | PAL offset generator A color subcarrier generator for PAL uses a one-quarter horizontal frequency signal from a sync generator to sample the subcarrier signal. The sampled signal is phase and frequency compared with a 25 Hz (one-half vertical frequency) signal from the same s... | 03/11/1986 |
| 4568889 | Distributed diode VCO with stripline coupled output and distributed variable capacitor control In a distributed IMPATT structure, power is coupled out through a side contact. That is, in previously proposed distributed IMPATT structures, the gain medium (the active region of the IMPATT) operates as a transmission line. The prior art has attempted t... | 02/04/1986 |
| 4505599 | Electronic clinical thermometer An electronic clinical thermometer comprises oscillating circuitry for producing two oscillating output signals having respective frequency-temperature coefficients which are widely different from each other. A frequency dividing circuit frequency divides... | 03/19/1985 |
| 4489272 | Test circuit for turn-on and turn-off delay measurements A test circuit that is particularly suitable for inclusion on an LSI chip when testing a new technology or process. The circuit will enable accurate determination of the effects of loading on the turn-on and turn-off delays of one or more logic circuits o... | 12/18/1984 |
| 4427952 | Oscillator circuit with digital temperature compensation The oscillator circuit comprises a digital temperature compensation circuit connected to a low and a high frequency quartz oscillator. The two quartz oscillators have the same inversion temperature points and a different temperature behaviour. In the temp... | 01/24/1984 |
| 4415870 | Oscillator circuit with digital temperature compensation An oscillator circuit having a digital temperature compensation circuit which contains two low frequency quartz oscillators, a beat frequency generator and a correction circuit and a logic circuit selectively controlling an addition circuit. The beat freq... | 11/15/1983 |
| 4392105 | Test circuit for delay measurements on a LSI chip A test circuit that is particularly suitable for inclusion on an LSI chip when testing a new technology. The circuit will enable accurate determination of the turn-on and turn-off delays of a logic circuit on the chip. Two related feedback loops are provi... | 07/05/1983 |
| 4365333 | Test signal generator A test signal generator for generating signals simulating the signals obtained from the axles of a railroad car, to permit testing of a railroad car brake controller. During testing of the controller for detection of excessive speed difference between the... | 12/21/1982 |
| 4345221 | Temperature compensated signal generator including two crystal oscillators A signal generator having a digital temperature compensation circuit contains high and low frequency quartz oscillators (HF and NF), the low frequency oscillator being used for temperature compensation. Both oscillators are manufactured such that the desc... | 08/17/1982 |
| 4344046 | Signal generator including high and low frequency oscillators A signal generator includes a high frequency oscillator such as a quartz crystal oscillator at a frequency of 4.19 MHz, a low frequency quartz oscillator with a frequency of 32 kHz, a beat frequency generator for producing a correction signal which is tra... | 08/10/1982 |
| 4136315 | Low and high frequency oscillators having common voltage regulator circuit A low frequency modulating signal and a high frequency carrier signal circuit employing a twin-T oscillator having an integrated circuit operational amplifier for producing the modulating signal and an L-C resonant feedback oscillator having a transistor ... | 01/23/1979 |
| 4061927 | Timing system for watering devices An electronic timing system for controlling a plurality of electrically controlled watering valves comprising a free running multivibrator circuit having a plurality of individually adjustable resistor-capacitor circuits for controlling the frequency. A d... | 12/06/1977 |
