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| Number | Title | Issue Date |
| 4879730 | Jitter tolerant circuit for dual rail data A retiming circuit is provided which accurately converts half-width dual rail data with up to one unit interval of jitter with respect to the data clock, into full-width data. The circuit is comprised of D-flip-flops and associated logic elements which ca... | 11/07/1989 |
| 4573406 | Screen printing device A screen printing device including a work table having a printing position with a holder to retain a substrate in the printing position, a holder for a screen provided with a mask, the mask having referenced portions, a microscope, an adjuster for positio... | 03/04/1986 |
| 4456991 | Telephone line circuit and system A telephone line circuit and system for interfacing digital exchange line circuits to a terminal interface of a switching network is disclosed. The system includes controllable active circuit impedance matching means for reducing impedance mismatch betwee... | 06/26/1984 |
| 4456987 | Digital switching network The switching network includes in one or more planes MN switching means arranged in M rows and N columns, where M and N are even integers, first intermediate switching devices associated with the M rows and second intermediate switching devices associated... | 06/26/1984 |
| 4455456 | Digital supervisory circuit for a telephone system The digital supervisory circuit comprises an amplitude comparator and EXCLUSIVE-OR gate to provide an output signal indicating the difference in time an input signal is above and below a predetermined reference potential. This output signal is integrated ... | 06/19/1984 |
| 4453134 | High voltage operational amplifier An operational amplifier is disclosed which is capable of handling input voltages in excess of 200 volts, comprising at least in the input stage thereof a plurality of low voltage transistors including at least a pair of low voltage lateral PNP transistor... | 06/05/1984 |
| 4443409 | Apparatus for improved low temperature ashing in a plasma Reactor apparatus for use with a gaseous plasma includes a grounded electrode in contact with the plasma. The electrode includes one or more bores in which plasma jets form.... | 04/17/1984 |
| 4439826 | Diagnostic system for a distributed control switching network A diagnostic system for a telecommunications system including a digital switching network is controlled via a plurality of data processors. Each of the distributed data processors has a unique address and has diagnostic data stored therein for use in perf... | 03/27/1984 |
| 4439815 | Printed circuit assembly for a card file packaging system A printed circuit assembly for a card file packaging system is disclosed that includes a flat flexible dielectric member having printed conductors disposed thereon patterned to form a printed circuit and a single piece rigid molded dielectric member to wh... | 03/27/1984 |
| 4439756 | Delta-Sigma modulator with switch capacitor implementation A Delta-Sigma ƊΣ modulator for one-bit analog to digital conversion of a signal, such as a telephone voice channel switch to digital form is disclosed. The circuit incorporates integration operative as low-pass filtering. The voice signal is sampled at ... | 03/27/1984 |
| 4435803 | Analog subscriber/trunk module with shared ringing source and ring-trip An apparatus and method of organizing line interface modules between analog subscriber lines/trunks and a digital switch with the provision for ringing signals which may be shared by a plurality of lines from a single source is described. The ringing sign... | 03/06/1984 |
