摘要:
An output circuit for a high speed and low power logic circuit is disclosed. The logic circuit (7) performs a logic operation on a plurality of input data signals supplied thereto and produces true and complementary intermediate output signals (P, P ), the logic high level of the intermediate output signal being lower than a first power voltage (V DD ) and the logic low level thereof being substantially equal to a second power voltage (GND). The output circuit (8) includes a P-channel MOS transistor (MP11, MP12) having a gate supplied with the complementary intermediate output signal ( P ,P), a source connected to a power voltage supplied with the first power voltage and a drain connected to an output terminal, and an N-channel MOS transistor (MN11, MN12) having a gate connected to the power terminal, a source supplied with the true intermediate output signal (P, P ) and a drain connected to the output terminal, and thus produces at the output terminal an output signal having a substantial logic amplitude between the first (V DD ) and second power voltages (V GND ).
摘要:
An improved FET capacitance driver logic circuit has an inverter feedback stage (22) connected from the output to the input of an output FET (23) to allow the output FET to have a large capacitance charging current surge followed by a reduced conduction thereafter.
摘要:
A multi base 2 input Bi-CMOS NAND circuit (30) is provided wherein an output node OUT connected to an output terminal (33) is coupled between pull up (31) and pull down (32) blocks. According to the present invention, the pull up block (31) is comprised of 2 identical basic cells, each comprised of a CMOS inverter (C31, C32) driving a NPN pull up transistor (T31, T32) mounted as an emitter follower. Logic signals (A31, A32) are applied on the inputs of the inverters (C31, C32), and the inverted signal ( A31, A32) is available at the emitter of the emitter follower which corresponds to the output of the cell. All emitters are tied altogether to perform an OR function and are connected to said output terminal (33). As standard, the pull down block (32) includes a logic stack (34) is comprised of 2 FETS (F31, F32) serially connected between said output node OUT and a discharge device such as a feedback NFET (Z), the gate of which is connected to said output node OUT. These 2 FETS are driving a NPN pull down transistor (T), the collector of which is also connected to the output node OUT.
摘要:
Digital logic driving stage circuitry is provided connected between ground (11) and a single voltage (V) with an enhancement mode type field effect transistor (2)and a depletion mode type field effect transistor (9)connected source to drain in series between the single voltage and ground. The gate (8) of the enhancement mode type field effect transistor (2) is the input of the logic signal and the gate (13) of the depletion mode type field effect transistor (9) is connected to ground (11), with the output at the connection between the transistors. A family of digital logic circuits is provided with circuit units made up of an enhancement mode logic input (15, 16, 17), depletion mode load (30) circuitry stage and an enhancement mode input grounded source follower load driving stage (2, 9).
摘要:
An improved cell layout for a C3MOS circuit with inductive broadbanding positions the inductor at a distance from the active region to improve isolation and aligns the edges of the resistor, inductor, and transistor regions near the common edge of adjacent cells to decrease the length of the cell-to-cell interconnect lines.
摘要:
A logic circuit for receiving a plurality of input differential signal pairs expressing respective logic inputs and for sequentially performing a plurality of logic operations on said logic inputs in successive logic stages, the logic circuit comprising a plurality of current switching sections corresponding to respective ones of said logic stages, with each of said current switching sections performing predetermined logic processing on a plurality of differential control signal pairs having a plurality of level ranges, a control signal generating section for converting each pair of said plurality of input differential signal pairs to a plurality of corresponding differential signal pairs having a plurality of level ranges, and supplying said corresponding differential signal pairs to a current switching section of a first logic stage, as respective differential control signal pairs, a plurality of inter-stage output signal generating sections each adapted to convert a differential signal pair produced by a preceding one of said current switching sections to produce a corresponding plurality of differential control signal pairs having respectively different level ranges and supplying said differential control signal pairs to a succeeding one of said current switching sections, and an output signal generating circuit for converting a differential signal pair produced by a current switching section of a final logic stage to an output differential signal pair.
摘要:
Method and circuitry for converting a differential logic signal to a single-ended logic signal eliminate slower PMOS transistors and speed up the conversion process. In specific embodiments differential logic signals of the type employed in, for example, current-controlled complementary metal-oxide-semiconductor (C3MOS) logic are converted to single-ended rail-to-rail CMOS logic levels using a differential pair of NMOS transistors with resistors as load devices and an NMOS current source transistor that provides dynamically adjusted tail current.
摘要:
Alternately skewed gates (1509) to reduce signal transmission delay. For one embodiment, an integrated circuit includes a chain of gates (1505, 1506, 1507, 1508) alternately skewed for fast rise and fast fall. Pulse encoding logic (1510) coupled to the chain of gates pulse encodes a signal to be provided to and transmitted by the chain of alternately skewed gates.
摘要:
Alternately skewed gates (1509) to reduce signal transmission delay. For one embodiment, an integrated circuit includes a chain of gates (1505, 1506, 1507, 1508) alternately skewed for fast rise and fast fall. Pulse encoding logic (1510) coupled to the chain of gates pulse encodes a signal to be provided to and transmitted by the chain of alternately skewed gates.
摘要:
A buffer circuit for providing dynamic threshold control. The buffer circuit includes a pair of input inverters (IV1,IV2) designed with different skewed threshold potential characteristics. The outputs of the skewed inverters (IV1,IV2) are directed to a logic circuit (30) designed to select either the faster or the slower signal received from the two inverters for transmission to passgate devices (40,50) coupled to the respective inverters. Only one of the passgate devices (40,50) is enabled to ensure that only one of the output signals from the two inverters is propagated through the buffer. A latch (60) is preferably connected between the logic circuit (30) and the two passgate devices (40,50) to maintain the states of the inverters (IV1,IV2) and the logic circuit (30). The circuit can be designed to define the threshold potential at which switching will occur so as to reduce propagation delay or increase it as desired. It is therefore possible using the circuit to increase transmission rates with minimal affect on signal noise.