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 |
| 4339673 | Driver circuits for automatic digital testing apparatus A driver circuit for use in testing either ECL (emitter-coupled logic) or TTL (transistor-transistor logic) devices. The circuit has a pair of variable reference voltages (VH,VL) for determining the logic levels 0 and 1. The circuit ... | 07/13/1982 |
| 4315167 | Self-switching bidirectional digital line driver A logic driver circuit repowers signals in either direction along a line, without requiring any external direction-control signal. Two back-to-back driver halves each include a gate, an open-collector transmitter and a latch. The latch is connected to the... | 02/09/1982 |
| 4307308 | Digital signal conversion circuit Circuit for converting input signals at TTL voltage levels to output signals at voltage levels for use with MOS logic circuits. The circuit employs an arrangement of NMOS FET's. Six FET's are arranged in pairs to form three inverters. Another FET is conne... | 12/22/1981 |
| 4289977 | CMOS Compatible bipolar drive circuit with protective clamp A bipolar drive circuit for driving a load, such as a printer, is compatible with complementary metal oxide semiconductor (CMOS) circuitry and may be driven by a non-inverting hex buffer. Connected to the input of the drive circuit is a clamp circuit for ... | 09/15/1981 |
| 4287433 | Transistor logic tristate output with reduced power dissipation A transistor logic tristate output device with plural phase splitter transistor means coupled in parallel configuration jointly to control sinking of current by the pulldown element with only one of the plural phase splitter transistor means coupled to co... | 09/01/1981 |
| 4283640 | All-NPN transistor driver and logic circuit An all-NPN bipolar transistor driver circuit characterized by low standby power dissipation and fast response, particularly at high input driving conditions. The bases of a pair of NPN transistors are commonly connected to an input terminal. The emitter o... | 08/11/1981 |
| 4255670 | Transistor logic tristate output with feedback A TTL transistor logic tristate output device particularly suitable for common bus applications including transistor and diode means for feedback of a portion of current from any output load and from stray capacitances to drive the pulldown element to gre... | 03/10/1981 |
| 4251742 | Current source, as for switching PIN diodes A current driver circuit using a two-level current source for switching PIN diodes. The driver is responsive to a binary signal control voltage for providing a respective forward-bias current or reverse-bias voltage. The two-level current source, responsi... | 02/17/1981 |
| 4242605 | Transient array drive for bipolar ROM/PROM A radiation hardened circuit for a bit line driver in a ROM or PROM wherein the discharge of the bit line capacitance is enhanced by shorting the current limiting resistor momentarily at the initiation of the discharge cycle and by allowing the bit line c... | 12/30/1980 |
| 4239981 | Fast semiconductor digital logic inverter gate An extremely fast, highly regulated and nonresistive semiconductor digital logic inverter gate which is suitable for use as a fundamental building block in an uncommitted gate array includes an input conductor, at least one output conductor, a first curre... | 12/16/1980 |
| 4220876 | Bus terminating and decoupling circuit The bus terminating circuit isolates itself from a bus in response to the magnitude of a power supply voltage decreasing below a predetermined threshold level. The bus terminating circuit includes a bus termination voltage divider network having one termi... | 09/02/1980 |
| 4219743 | Buffer circuit A buffer circuit for yielding a high output quickly while consuming low power having an input terminal, an output terminal, a pair of power supply rails, a bootstrapping capacitance, an output circuit coupled between the supply rails and having an input c... | 08/26/1980 |
| 4196360 | Interface driver circuit An interface driver circuit, for use in a programmable energy load controller system, comprises a pair of optically-coupled input sections, respectively receiving data and a special signal of digital nature and a first voltage polarity. A buffer amplifier... | 04/01/1980 |
| 4194135 | Electronic signal level translating circuitry This circuitry translates a relatively large voltage bi-level logical signal to an inphase relatively low voltage bi-level signal for bistatic current-switching logical circuitry. A transistor is connected in the common base circuit arrangement for a firs... | 03/18/1980 |
| 4191899 | Voltage variable integrated circuit capacitor and bootstrap driver circuit An integrated circuit junction capacitor is formed using conventional bipolar transistor technology. Voltage variable capacitance is provided by a reverse biased emitter-base junction and parasitic collector-base capacitance is isolated from the emitter-b... | 03/04/1980 |
| 4166963 | Buffer circuit for a data highway A line buffer circuit for coupling an interface to a data highway without requiring separate signal paths for sense and drive functions, comprises a unity-gain voltage amplifier coupling a line in the highway to the respective interface terminal for the s... | 09/04/1979 |
| 4158891 | Transparent tri state latch Tri state logic gates in series are disclosed for permitting the latching of information from a first circuit by enabling a second circuit at the time information from the first circuit becomes valid. At the start of the memory cycle the second circuit is... | 06/19/1979 |
| 4147940 | MOS Interface circuit A circuit utilizing a source follower and a comparator to interface an MOS digital circuit with bipolar digital circuits is disclosed.... | 04/03/1979 |
| 4109163 | High speed, radiation hard complementary MOS capacitive voltage level shift circuit A complementary MOS voltage level shift circuit which can be used as a memory buffer circuit, for example, is disclosed. The circuit utilizes both N-channel depletion mode devices and P-channel enhancement mode MOS devices preferably fabricated on silicon... | 08/22/1978 |
| 4090154 | Matching arrangement for converting bi-directional signals into binary signals A matching network for distributing high frequency bi-directional signals transmitted along a coaxial transmission line includes a transformer and an active filter having a second order transfer function for coupling a transmitter or a receiver to the tra... | 05/16/1978 |
| 4049979 | Multi-bootstrap driver circuit Plural bootstrap capacitors are coupled to an output stage of a MOSFET driver. A conventional bootstrap driver is preceded by one or more additional bootstrap stages. Each one includes a capacitor, a tri state inverter and a delay section. When the output... | 09/20/1977 |
| 4037115 | Bipolar switching transistor using a Schottky diode clamp A transistor-transistor logic gate is described which uses a number of bipolar switching transistors clamped in several different ways. In particular to better adapt a bipolar switching transistor to high frequency, high temperature operation, the collect... | 07/19/1977 |
| 4032800 | Logic level conversion system A circuit arrangement which permits interfacing logic systems operating on different logic levels and thus requiring different supply voltages in which the supply voltage for the logic system having the smaller signal excursion is obtained by means of a p... | 06/28/1977 |
| 4029971 | Tri-state logic circuit A line driver including a pair of complementary transistors having their conduction paths serially connected between an operating and a reference potential and their bases connected through a first switch to a signal input terminal. A second switch is con... | 06/14/1977 |
| 4011468 | Low power clock driver A low power dissipation circuit for generating clock pulses comprises a plurality of solid state devices which are normally off and draw only leakage current in their quiescent state. The clock pulse is started by a signal to a set side driver and is stop... | 03/08/1977 |
| 3993954 | Electric communication system A data transmission system for transmitting data and subsidiary information by means of pulses of different widths corresponding to a multiple of a signal propagation time delay of a NAND gate. The system makes it possible to simplify the construction of ... | 11/23/1976 |
| 3991325 | Transistor amplifier for generating complementary trapezoidal waveforms A transmission line amplifier for generating substantially identical complementary trapezoidal output waveforms for a twisted pair transmission line thereby reducing cross-talk on the twisted pair lines. Current summing means and a capacitor are used to i... | 11/09/1976 |
| 3974403 | Digital data transmission system A driver circuit for a digital data transmission system is provided with a transistor current limiting network, the network being bypassed by a capacitor. The network is selectively supplied with a disabling signal via another transistor to disconnect the... | 08/10/1976 |
| 3969639 | Transmission line driver circuit A transmission line driver circuit especially designed for transmitting nonsymmetrical codes wherein signals to be transmitted are coupled to the lines by means of first and second transformers. A pair of digital logic circuits are connected to said first... | 07/13/1976 |
| 3946251 | Pulse level correcting circuit A pulse level correcting circuit wherein a resistance is interposed between the input and output sides, and a branch line including a switching element is disposed between an output terminal and a reference voltage terminal, the switching element being ad... | 03/23/1976 |
| 3937988 | Active termination network for clamping a line signal An active termination network for clamping a line signal near the receiving end of a data path. The termination network comprises an NPN transistor, a PNP transistor, the emitter electrodes of the transistors being coupled together to form an input termin... | 02/10/1976 |
