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At 04:46 PM 9/9/99 -0400, you wrote:
>
> Hi, it's me again. :) I was just looking at the specs on the
>Aiwa AM-F70. Does that say that it has 1 BIT DAC/ADC. If it isn't a
>mistake, isn't that garbage for a dig/analog converter???
No. It is the best type of audio DAC. It is no mistake.
Colin B once wrote:
>Conventional 16 bit convertors produce a 16 bit wide binary value that is
>represented as either logic high or logic low levels on 16 separate wires
>for each sample value. These wires are connected to a resistor network to
>produce voltages proportional to the binary values represented by the logic
>highs and lows on the 16 wires.
>
>1 bit convertors use a technique called pulse width modulation (PWM). This
>involves producing a voltage pulse of a duration proportional to the value
>of the sample, for each sample. The longer the pulse, the higher the
>voltage effectively produced (after filtering).
>
>The resistor network method suffers from inaccuracy due to the variations
>from ideal in the voltages produced by each binary digit, caused by small
>variances in the resistor values making up the divider network. PWM OTOH
>gives very good accuracy because it relies only on a single voltage and an
>accurate time base - both very easy to achieve.
--
Archer
http://www.geocities.com/SoHo/6413/
End.
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