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6111438 Current memory and circuit arrangement comprising current memories  
A current memory cell comprises a fine MOS memory transistor (T1) and a coarse MOS memory transistor (T2) connected in series between two power supply rails. Such current memory cells are...
6111433 Differential output driver with monotonic output transitions  
Method and circuitry for differential output driver with monotonic output transitions. The switching sequence for the output driver transistors of the differential driver changes depending on the...
6107819 Universal non volatile logic gate  
A programmable circuit is provided. The programmable circuit includes a programmable inverter circuit (PIC) that is configured to receive an input signal and to generate an output signal. The...
6107828 Programmable buffer circuit and a mask ROM device having the same  
A programmable buffer circuit comprises a logical gate circuit having a second input terminal, a third input terminal and a first output terminal, and a first input terminal. The second input...
6097219 Output buffer circuit with adjustable driving capability  
An output buffer circuit drives an output terminal of an integrated circuit by means of at least two buffer circuits. A buffer control circuit in the output buffer circuit selectively enables or...
6097216 Integrated buffer circuits having improved noise immunity and TTL-to-CMOS signal conversion capability  
Integrated buffer circuits which are less susceptible to noise and provide TTL-to-CMOS signal conversion capability include a first TTL-compatible inversion buffer, a second CMOS-compatible...
6094069 Semiconductor integrated circuit having controlled output resistance of an output buffer circuit  
An object is to provide a semiconductor integrated circuit capable of controlling the output resistance value of an output buffer circuit always at a given value without deteriorating the data...
6094086 High drive CMOS output buffer with fast and slow speed controls  
An output buffer is provided which receives an input signal and drives an output terminal. The output buffer has a first driver and a second driver for driving the output terminal to a voltage...
6087853 Controlled output impedance buffer using CMOS technology  
CMOS technology is used to create a controlled output impedance output buffer circuit. An output buffer driver uses buffer circuits having impedance elements with linear characteristics. A control...
6084426 Compensated input receiver with controlled switch-point  
A compensated CMOS receiver includes an inverter, at least one compensation transistor coupled between a first voltage and the output of the inverter, a comparison circuit coupled to the output of...
6084437 Logic circuit utilizing pass transistors and logic gate  
A logic circuit combines a plurality of pass-transistor logic trees and a multiple-input logic gate for receiving intermediate logic signals from the respective pass-transistor logic trees, and...
6081915 Method and apparatus for reducing the time required to test an integrated circuit using slew rate control  
Method and apparatus for reducing the time required to test an integrated circuit (10) using slew rate control. Using a very slow slew rate during normal operation may reduce electromagnetic...
6072333 Tristate output circuit  
The drains of P- and N-channel MOS transistors 1 and 2 are connected to each other. An output terminal is formed at the node of the drains. Each of first and second amplifier stages 4 and 5 is...
6069486 Circuit configuration for reducing disturbances due to a switching of an output driver  
A circuit configuration for reducing disturbances due to a switching of an output driver. The output driver has a plurality of output driver stages and a delay element. The delay element increases...
6066962 Digital integrated circuit buffer digital device and method for buffering data  
The present invention provides digital integrated circuits, buffers, digital devices and methods for buffering data. One embodiment of the digital integrated circuit comprises: a data input...
6060907 Impedance control circuit  
An impedance control circuit is provided which controls the output impedance of drivers which are coupled to the impedance control circuit. Accordingly, a desired driver output impedance can...
6054875 Output buffer for a mixed voltage environment  
An output buffer to serve as an interface between a main logic circuit and a peripheral device is described. The output buffer includes a first transistor adapted to be coupled to a first voltage...
6051995 Constant impedance, low noise CMOS buffer  
A low noise CMOS buffer has been provided which includes the advantages of having a stable load impedance and a linear-ramped current waveform at the output. The buffer adds waveform shaping...
6046621 Differential signal generator with dynamic beta ratios  
A differential signal generator for generating a true/complement output signal pair in response to a single-ended input signal is disclosed. The differential signal generator includes an input...
6043683 Output pad circuit using control signal  
An output pad circuit is provided that adjusts a driving output current size within the chip based on a control signal. Thus, the output pad circuit adjusts a driving output current size, without...
6040715 Output buffer control circuit that performs high speed operation by generating a predetermined width of a pulse based on an output control signal  
An output buffer control circuit is provided in which a three-phase (state) level of an output warning can be realized in a short time, which results in increasing the processing speed. The output...
6037811 Current-controlled output buffer  
A current-controlled output buffer circuit includes a control circuit, a charging circuit, and a discharging circuit. The control circuit is configured to receive a control signal, and in response...
6028451 Method and apparatus for topology dependent slew rate control  
A slew rate control circuit of a bus includes two connection devices that are adapted to be coupled to two voltage supplies. The connection devices are connected to the bus by a select terminal of...
6028449 Integrated circuit I/O buffer having pull-up to voltages greater than transistor tolerance  
An integrated circuit having a DC current test function operates at a core supply voltage and interfaces at an input-output (I/O) supply voltage. The I/O supply voltage is greater than the core...
6023176 Input buffer  
An input buffer is provided which can function as either a voltage referenced input buffer or a non-voltage referenced input buffer. The input buffer includes a circuit which is selectively...
6014046 Off chip driver (OCD) with variable drive capability for noise control  
An Off Chip Driver (OCD) having a high, a low and a high impedance (Hi-Z) state. The OCD includes an up-level pre-drive, a down-level pre-drive and a driver. The driver mirrors current in the...
6008669 Monolithic integrated multiple mode circuit  
A monolithic integrated multiple mode circuit having an output stage, a transfer gate, a control circuit arrangement, and a well contacting region where a well potential may be applied, the...
5994922 Output buffer, semiconductor integrated circuit having output buffer and driving ability adjusting method for output buffer  
A semiconductor integrated circuit has an internal circuit to execute a predetermined circuit operation, an input node to which output from the internal circuit is provided, and an output buffer...
5994921 Universal sender device  
A sender device capable of sending digital information in the form of electrical binary signals to a receiver device. N-MOS transistors and P-MOS transistors are arranged in pairs. Each pair...
5986489 Slew rate control circuit for an integrated circuit  
A slew rate control circuit to control output slew rate according to a programmable reference signal. A slew rate control circuit limits the slew rate of a plurality output buffers according to a...
5977790 Apparatus and method of providing a programmable slew rate control output driver  
The present invention is a method and apparatus for providing slew rate control. The apparatus comprises a first circuit and a second circuit having an output terminal that is coupled to a first...
5973521 Semiconductor device for automatically detecting external interface voltage  
A semiconductor device for automatically detecting an external interface voltage is disclosed, including a voltage converter for receiving an external interface voltage, and decreasing the...
5973512 CMOS output buffer having load independent slewing  
A buffer having an output slew rate which is relatively insensitive to loading and supply voltage. The output buffer includes an output node, a first half-circuit and a second half-circuit. The...
5966036 System and method for a mixed voltage drive system for floating substrate technology  
A system for buffering input and output signals in a floating substrate technology environment comprises an output pre-driver and an output driver. The output pre-driver includes a pull-up...
5963047 Noise supression using neighbor-sensing for a CMOS output buffer with a large DC current sink  
A CMOS output buffer has as pull-downs a smaller driver transistor and a larger driver transistor. Both transistors drive the output low in parallel initially during a voltage transition, but the...
5959473 Transistor output circuit  
A transistor output circuit comprises a first insulated gate transistor having a control electrode connected to an input terminal, one main electrode connected to a first diode, and the other main...
5949259 Zero-delay slew-rate controlled output buffer  
An output buffer in accordance with the present invention exhibits a fixed output signal slew rate. The output signal behavior is independent of the capacitive load seen by the buffer. The circuit...
5929668 Data output buffer circuit  
A data output buffer circuit for rapidly outputting data read from a memory cell of a semiconductor integrated circuit to an external circuitry without generating noise of a high voltage level...
5929694 Semiconductor device having voltage generation circuit  
A semiconductor device operates in one of at least two different modes including a first mode and a second mode. The semiconductor device includes a first voltage generating circuit operating in...
5929669 Output buffer circuit for semiconductor memory devices  
Disclosed is an output signal buffer circuit of semiconductor memory devices comprises: a plurality of buffer groups each comprising a plurality of output buffers grouped into unit group, in which...
5923183 CMOS output buffer circuit exhibiting reduced switching noise  
A CMOS output buffer circuit includes a predriving circuit which generates two predriving signals, a main driving circuit which has a plurality of parallel connected pull-up transistors and a...
5917340 Twisted-pair driver with staggered differential drivers and glitch free binary to multi level transmit encoder  
A twisted-pair current driver is implemented in CMOS. EMI from sharp changes in the current driven is reduced by gradually changing the current driven when the inputs change. The current driver is...
5914618 Optimum noise isolated I/O with minimized footprint  
An I/O buffer with minimized footprint; which is less susceptible to voltage spikes caused by switching noise, and which is adapted for used in a separate power bus arrangement. The buffer...
5898321 Method and apparatus for slew rate and impedance compensating buffer circuits  
A method and an apparatus for adjusting the slew rate and impedance of a buffer in an integrated circuitry. In one embodiment, an integrated circuit buffer includes a pre-driver circuit, which...
5894238 Output buffer with static and transient pull-up and pull-down drivers  
An output driver for high speed integrated circuits includes a static driver portion and a transient driver portion. The static driver size can be adjusted to satisfy the minimal requirements for...
5877647 CMOS output buffer with slew rate control  
An output buffer 10 of an integrated circuit controls the slew rate of an output signal in order to minimize electro-magnetic interference. Transient current delay circuits 132 and 134 provide a...
5874836 High reliability I/O stacked fets  
The effects on device reliability of across chip length variation (ACLV), gate ion channeling and dislocation are reduced or eliminated in input/output (I/O) stacked field effect transistors...
5862390 Mixed voltage, multi-rail, high drive, low noise, adjustable slew rate input/output buffer  
A universal input/output buffer uses all digital-type components, can be included on an integrated circuit chip and operates in a mixed voltage, multi-rail, power supply environment. The...
5854560 CMOS output buffer having a high current driving capability with low noise  
In a preferred embodiment of the present invention an output buffer includes high current drivers that avoids a short circuit current. Further, the inventive output buffer only produces a slight...
5852579 Method and circuit for preventing and/or inhibiting contention in a system employing a random access memory  
A Static Random Access Memory (SRAM) comprises an input/output pin and driver means connected to the input/output pin. The driver means are configured to drive the input/output pin to a voltage...