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An asynchronous (ripple) counter is a "chain" of toggle (T) flip-flops in which the least-significant flip-flop (bit 0) is clocked by an external signal (the counter input clock), and all other flip-flops are clocked by the output of the nearest, less significant flip-flop (e.g., bit 0 clocks the bit 1 flip-flop, bit 1 clocks the bit 2 flip ...
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 ...
synchronous presettable 4-bit decade counter, asynchronous clear 16 SN74LS160A: 74x161 1 synchronous presettable 4-bit binary counter, asynchronous clear 16 SN74LS161A: 74x162 1 synchronous presettable 4-bit decade counter, synchronous clear 16 SN74LS162A: 74x163 1 synchronous presettable 4-bit binary counter, synchronous clear 16 SN74LS163A ...
[3] Any RTL modifications to improve clock gating will result in functional changes to the design (since the registers will now hold different values), which need to be verified. Sequential clock gating is the process of extracting/propagating the enable conditions to the upstream/downstream sequential elements, so that additional registers can ...
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. An arrangement of flipflops is a classic method for integer-n division. Such division is frequency ...
The 4-bit analog-to-digital quantizer uses designations "S" (sign), "1", "2", and "4" for each bit. Each "F" stands for flip-flop and each "G" is a gate, controlled by the 110 kHz oscillator. The principle of improving the resolution of a coarse quantizer by use of feedback, which is the basic principle of delta-sigma conversion, was first ...
The 8254 is implemented in HMOS and has a "Read Back" command not available on the 8253, and permits reading and writing of the same counter to be interleaved. [ 2 ] Modern PC compatibles, either when using SoC CPUs or southbridge typically implement full 8254 compatibility for backward compatibility and interoperability. [ 3 ]
Each word is preceded by a 3 μs sync pulse (1.5 μs low plus 1.5 μs high for data words and the opposite for command and status words, which cannot occur in the Manchester code) and followed by an odd parity bit. Practically each word could be considered as a 20-bit word: 3-bit for sync, 16-bit for payload and 1-bit for odd parity control ...