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  2. Counter (digital) - Wikipedia

    en.wikipedia.org/wiki/Counter_(digital)

    A 4-bit synchronous counter using JK flip-flops. In a synchronous counter, the clock inputs of the flip-flops are connected, and the common clock simultaneously triggers all flip-flops. Consequently, all of the flip-flops change state at the same time (in parallel). For example, the circuit shown to the right is an ascending (up-counting) four ...

  3. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    synchronous presettable 4-bit binary counter, synchronous clear 25 Ω series resistor 16 QS74FCT2163T: 74x2164 1 16k x 5 cache address comparator three-state (32) SN74ACT2164: 74x2166 1 16k x 5 cache address comparator with input latches three-state (32) SN74BCT2166: 74x2191 1 synchronous presettable 4-bit binary up/down counter, common clock

  4. List of 4000-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_4000-series...

    The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...

  5. Linear-feedback shift register - Wikipedia

    en.wikipedia.org/wiki/Linear-feedback_shift_register

    A standard LFSR has a single XOR or XNOR gate, where the input of the gate is connected to several "taps" and the output is connected to the input of the first flip-flop. A MISR has the same structure, but the input to every flip-flop is fed through an XOR/XNOR gate. For example, a 4-bit MISR has a 4-bit parallel output and a 4-bit parallel input.

  6. 4-bit computing - Wikipedia

    en.wikipedia.org/wiki/4-bit_computing

    While 4-bit computing is mostly obsolete, 4-bit values are still used in the same decimal-centric roles they were developed for, and modern implementations are generally much wider and process multiple 4-bit values in parallel. An example of such a system is the HP Saturn design of the 1980s. By the 1990s, most such uses had been replaced by ...

  7. Digital electronics - Wikipedia

    en.wikipedia.org/wiki/Digital_electronics

    The most common example of this kind of software is the Espresso heuristic logic minimizer. Optimizing large logic systems may be done using the Quine–McCluskey algorithm or binary decision diagrams. There are promising experiments with genetic algorithms and annealing optimizations.

  8. Frequency divider - Wikipedia

    en.wikipedia.org/wiki/Frequency_divider

    An animation of a frequency divider implemented with D flip-flops, counting from 0 to 7 in binary. For power-of-2 integer division, a simple binary counter can be used, clocked by the input signal. The least-significant output bit alternates at 1/2 the rate of the input clock, the next bit at 1/4 the rate, the third bit at 1/8 the rate, etc.

  9. Barrel shifter - Wikipedia

    en.wikipedia.org/wiki/Barrel_shifter

    The very fastest shifters are implemented as full crossbars, in a manner similar to the 4-bit shifter depicted above, only larger. These incur the least delay, with the output always a single gate delay behind the input to be shifted (after allowing the small time needed for the shift count decoder to settle; this penalty, however, is only incurred when the shift count changes).