摘要:
A push-pull driver circuit wherein the input signal (1) is applied to turn on one (6) of two transistors (5, 6) mounted in series and the inversion of that signal is applied to the second transistor (5) in the series path and the output taken from between then operates to isolate the load and since one and only one of the two transistors in the series path is conducting there is a path to charge and discharge the load capacitance (3) but no path through both devices for power dissipation. The driver circuit can be built into a 2-bit partitioning circuit (23) which in turn, when used with a programmed logic array (20) and the relative capacitance of the various parts being isolated from each other byacoupling circuit (54) , the resulting assembly provides a high performance programmed array logic device.
摘要:
A condensed single block PAL plus PLA architecture utilizing a rectangular shape is shown. By interleaving the ORterms of the PLA array with the Pterms of the PAL array, is significant amount of die space is saved when incorporating the circuit with silicon. The decode routing required is now simplified and the propagation delay skews through the array are also reduced.
摘要:
A condensed single block PAL plus PLA architecture utilizing a rectangular shape is shown. By interleaving the ORterms of the PLA array with the Pterms of the PAL array, is significant amount of die space is saved when incorporating the circuit with silicon. The decode routing required is now simplified and the propagation delay skews through the array are also reduced.
摘要:
A monolithically integrated programmable device having elementary modules connected electrically by means of memory cells of the flash type. which cells allow the signal paths between signal lines of the elementary modules to be programmed and re-programmed. Preferably, the flash memory cells are Fowler-Nordheim Effect cells.
摘要:
A PLD comprises a programmable first AND array whose inputs are selectively connectable to input lines and whose outputs are selectively connectable to a programmable second OR array. The PLD further comprises a programmable third AND array whose inputs are selectively connectable to the input lines, and whose outputs are fixedly connected to inputs of a fixed fourth OR array. The outputs from the second OR array are also connected in a fixed manner to the fourth OR array. This arrangement overcomes some of the weaknesses in both the conventional PAL and PLA architectures while retaining most of their strengths.
摘要:
A programmable logic circuit (202 - 204) that accepts three input signals (A, B, C) from a logic gate array of logic devices on a programmable logic device and to produce a selected logic function as output signal (219) that depends on the input signals, the circuit comprises logic expander means having first, second and third data input terminals (199-1, 199-2, 199-3) for receiving three input signals A, B and C, respectively, having an output terminal, and having up to eight control input terminals (CB0 - CB7) to receive control signals thereat, for producing a desired output signal (OUT) that is selectively determined by the control signals and is equivalent to the logical sum of logic variables CS0 · A · B · C + CS1 · A* · B · C + CS2 · A · B* · C + CS3 · A · B · C* + CS4 · A* · B* · C + CS5 · A* · B · C* + CS6 · A · B* · C* + CS7 · A* · B* · C*, where CS0, CS1, CS2, CS3, CS4, CS5, CS6 and CS7 are control signals delivered to the control input terminals; and programming means for providing the control signals at the control input terminals to produce a desired output signal for the logic expander means.
摘要:
An input transition detection circuit for detecting when an input signal switches states, the input transition detection circuit then providing a time delay signal at a time delay signal node to enable a zero-power part to wake up from a low power mode. The input transition detection circuit (400) includes two inverters (402, 404) and four transistors (406, 408, 410, 412) compared to the two inverters and nine transistors utilized in previous circuits. The two inverters (402, 404) are coupled in series for receiving and delaying the input signal. A first p-channel transistor (406) has its source coupled to receive the input signal and gate coupled to the output of the two inverters (402, 404). A second p-channel transistor (408) has its source coupled to the output of the two inverters (402, 404) and gate coupled to receive the input signal. A first n-channel transistor (410) is coupled to the drain of the first and second p-channel transistors (406, 408) and provides a current sink which draws less current than either the first or second p-channel transistors (406, 408) providing a voltage to control the gate of a second n-channel transistor (412). The second n-channel transistor (412) connects the time delay signal node to ground. The second n-channel transistor (412) enables the input transition detection circuit (400) to be faster than previous circuits since only one transistor (412) connects the time delay signal node to ground.
摘要:
Dispositif logique programmable possédant des premiers réseaux logiques multiples, tels que des réseaux ET (11), pourvus chacun d'un ensemble différent d'entrées (13) et fonctionnant simultanément en totalité, dans lequel les sorties (17) de deux ou plusieurs premiers réseaux logiques (11) sont partagées dans une deuxième porte ou réseau logique unique (21), tel qu'une porte ou un réseau OU (21). Dans un mode de réalisation de l'invention, un nombre N de premiers réseaux logiques (11) et un nombre M de deuxièmes réseaux logiques (21) sont reliés de façon que chaque deuxième réseau logique reçoive des termes intermédiaires de tous les premiers réseaux logiques (11) et les termes intermédiaires provenant de chaque premier réseau logique (11) sont partagés par plusieurs deuxièmes réseaux logiques (21). Dans un deuxième mode de réalisation, un nombre N de premiers réseaux logiques (41) et une pluralité de deuxièmes portes logiques (51, 53) sont reliés de façon qu'au moins quelques-unes des deuxièmes portes logiques (53) reçoivent des termes intermédiaires (49) de deux premiers réseaux logiques contigus (41).