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2. Flip-flop (electronics) - Wikipedia

   en.wikipedia.org/wiki/Flip-flop_(electronics)

   When T is held high, the toggle flip-flop divides the clock frequency by two; that is, if clock frequency is 4 MHz, the output frequency obtained from the flip-flop will be 2 MHz. This "divide by" feature has application in various types of digital counters .

3. Frequency divider - Wikipedia

   en.wikipedia.org/wiki/Frequency_divider

   An arrangement of D flip-flops is a classic method for integer-n division. Such division is frequency and phase coherent to the source over environmental variations, including temperature. The easiest configuration is a series where each D flip-flop is a divide-by-2. For a series of three of these, such a system would be a divide-by-8.

4. List of 7400-series integrated circuits - Wikipedia

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

   2 dual J-K flip-flop, asynchronous clear 14 SN54LS73A: 74x74 2 dual D positive edge triggered flip-flop, asynchronous preset and clear 14 SN74LS74A: 74x75 1 4-bit bistable latch, complementary outputs 16 SN74LS75: 74x76 2 dual J-K flip-flop, asynchronous preset and clear 16 SN74LS76A: 74x77 1 4-bit bistable latch 14 SN54LS77: 74H78 2

5. Counter (digital) - Wikipedia

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

   An asynchronous (ripple) counter is a "chain" of toggle (T) flip-flops wherein 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-flop ...

6. Shift register - Wikipedia

   en.wikipedia.org/wiki/Shift_register

   At each advance, the bit on the far left (i.e. "data in") is shifted into the first flip-flop's output. The bit on the far right (i.e. "data out") is shifted out and lost. The data is stored after each flip-flop on the "Q" output, so there are four storage "slots" available in this arrangement, hence it is a 4-bit register.

7. U.S. looks to end subminimum wage for workers with disabilities

   www.aol.com/u-looks-end-subminimum-wage...

   The Department of Labor is proposing to phase out a controversial Depression-era program that lets some employers pay disabled workers less than the federal minimum wage.