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| Number | Title | Issue Date |
| 5036377 | Triac array Thyristors of one conductivity type formed as an array in a first semiconductor body are respectively connected in parallel with thyristors of the opposite conductivity type formed as an array in a second semiconductor body to produce an array of triacs. ... | 07/30/1991 |
| 4989248 | Speaker-dependent connected speech word recognition method A cost-effective word recognizer. Each frame of spoken input is compared to a set of reference frames. The comparison is equivalent to embodying the reference frame as an LPC inverse filter, and is preferably done in the autocorrelation domain. To avoid t... | 01/29/1991 |
| 4954994 | FIFO memory capable of simultaneously selecting a plurality of word lines A semiconductor memory device is constructed so that a plurality of word lines may be simultaneously selected by the transfer of information through a plurality of shift register positions of a shift register, wherein the respective shift register positio... | 09/04/1990 |
| 4954458 | Method of forming a three dimensional integrated circuit structure A semiconductor circuit apparatus including several semiconductor substrates interconnected by having elevated portions of one substrate contacting the surface of the second substrate where both substrates include at least one electrical circuit. Also inc... | 09/04/1990 |
| 4954977 | Pedagogic calculating machine for arithmetic instruction Calculating machine comprising a microprocessor (1) controlling the operations carried out by the machine, a stack (2) of shift registers connected to the microprocessor and intended for the temporary storage of the numbers with which the operations are t... | 09/04/1990 |
| 4946391 | Electronic arithmetic learning aid with synthetic speech An electronic handheld arithmetic learning aid which includes a speech synthesis device, a speaker driven by the speech synthesis device, a memory having digital data stored therein from which a plurality of mathematical problems may be derived for presen... | 08/07/1990 |
| 4944014 | Method for synthesizing echo effect from digital speech data An echo effect is synthesized in a coded digital sound signal. An input sound signal is stored as a plurality of sequential frames of similar duration, each frame (n) having characteristics including an energy (E). A delay period (d) is selected as equal ... | 07/24/1990 |
| 4941127 | Method for operating semiconductor memory system in the storage and readout of video signal data A method of employing a semiconductor memory system in the storage and readout of video signal data, wherein first and second FIFO memories are utilized in a tandem manner to perform video-related operations in a plurality of functional modes, such as a f... | 07/10/1990 |
| 4941123 | Data communications system with automatic communications mode A data communication system in which a host data processing system is responsive to an automated sequence of data processing request signals from a remote data processing system. The remote data processing system includes a means for generating and storin... | 07/10/1990 |
| 4939394 | Synchronous circuit system having asynchronous signal input A synchronous circuit system comprises a switch circuit for receiving an asynchronous imput signal only within a specified period in response to a synchronizing signal, a latch circuit connected to the switch circuit, a signal transmission circuit connect... | 07/03/1990 |
| 4922539 | Method of encoding speech signals involving the extraction of speech formant candidates in real time Method of encoding speech signals which is based upon determining the roots of the linear prediction polynomial describing the spectrum of an analog speech signal, wherein the roots are candidates in determining the formants of the speech signal. The meth... | 05/01/1990 |
| 4920283 | High speed, low noise integrated circuit An integrated circuit is described which includes a plurality of output transistors (T1, T2, . . . Tn) for emitting binary signals to associated output terminals (A1, A2, . . . An). The integrated circuit further includes at least one ground terminal (M; ... | 04/24/1990 |
| 4912768 | Speech encoding process combining written and spoken message codes A speech encoding process, wherein a first sequence of input data representative of a written version of a message to be coded is encoded to provide a first encoded speech sequence corresponding to the written version of the message to be coded, and a sec... | 03/27/1990 |
| 4902917 | Integrated circuit having mode selection The mode of operation of an intergrated circuit capable of several modes of operation is determined by at least one signal applied to one or more mode selection terminal pins. The signal applied is a selected one of at least two signals derived from a clo... | 02/20/1990 |
| 4901132 | Semiconductor integrated circuit with switching bipolar transistors having high withstand voltage capability A semiconductor device is primarily composed of a semiconductor substrate of a first conductivity type and a semidonductor layer of a second conductivity type formed in a principal plane of the semiconductor substrate. The device has both a bipolar transi... | 02/13/1990 |
