Synchronous_counters

Synchronous_counters - 4070B D S R Q Q IC6a 4013B IC3c...

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Synchronous Counters.lvw page 1 of 2 INPUTS - OUTPUTS Q1 Q0 D1 D0 0 0 0 1 0 1 1 0 1 0 1 1 1 1 0 0 SYNCHRONOUS COUNTERS These are counters that don't suffer from "race-hazard" spikes experienced with ripple counters. Each time an output changes, the data for the next count is already present at the data inputs to the D-type flip-flops. D S R Q Q 4013B D S R Q Q 4013B 4070B 1Hz 2 4 LT BL ST 8 1 e d c b a g f IC3 4511B RP1 220 DS1 0V 9V D S R Q Q IC4a 4013B D S R Q Q IC4b 4013B IC2b 4070B 1Hz IC5a 4081B IC2c 4070B D S R Q Q IC6a 4013B 2 4 LT BL ST 8 1 e d c b a g f IC7 4511B RP2 220 DS2 0V 9V 3 Bit Synchronous Counter INPUTS - OUTPUTS Q2 Q1 Q0 D2 D1 D0 0 0 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 1 0 1 1 1 0 0 1 0 0 1 0 1 1 0 1 1 1 0 1 1 0 1 1 1 1 1 1 0 0 0 Clock Q0 Q1 2 BIT COUNTER 3 BIT COUNTER Phil Tow nshend www .edutek.ltd.uk Q0 Q1 Q2 Clock
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Synchronous Counters.lvw page 2 of 2 4-BIT COUNTER D S R Q Q IC1a 4013B D S R Q Q IC1b 4013B IC2a 4070B 1Hz IC3a 4081B IC2b 4070B D S R Q Q IC4a 4013B 2 4 LT BL ST 8 1 e d c b a g f IC5 4511B RP1 220 DS1 0V 9V IC2c 4070B D S R Q Q IC4b 4013B IC3b 4081B IC2d
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Unformatted text preview: 4070B D S R Q Q IC6a 4013B IC3c 4081B INPUTS - OUTPUTS Q3 Q2 Q1 Q0 D3 D2 D1 D0 > 1 1 > 1 1 > 1 1 1 1 > 1 1 > 1 1 1 1 > 1 1 1 1 > 1 1 1 1 1 1 > 1 1 > 1 1 1 1 > 1 1 1 1 > 1 1 1 1 1 1 > 1 1 1 1 > 1 1 1 1 1 1 > 1 1 1 1 1 1 > 1 1 1 1 1 1 1 1 > Q0 Q1 Q2 Q3 SYNCHRONOUS COUNTERS It is simple to add further stages to the binary counter by repeatedly adding the circuit shown left. x y x y clk Q Phil Tow nshend w w w .edutek.ltd.uk Clock...
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This document was uploaded on 02/08/2012.

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Synchronous_counters - 4070B D S R Q Q IC6a 4013B IC3c...

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