U
Uriah
- Jan 1, 1970
- 0
I am still having a hard time understanding Load and Source impedance.
When someone says you need a low ouput Impedance and high imput
impedance to transfer the most signal? Are they saying a low output
Impedance is wired to the input impedance in parallel so that low side
is not changed much by a high impedance R in parrallel?
Does low Impedance mean high current? And High I mean low current?
Does low I mean high V? And high I mean low V? But if you have a
voltage with a resistor in series and you raise the value of R to 10XR
(Isn't R really I) the current drops so you have lower impedance but
doesn't the voltage drop on the resistor increase so you have high V?
Another example from a book I am reading talks about sending data over
a data bus from a CPU to ROM and says "you need Low impedance from the
CPU to drive the byte firmly on to the bus" And " High impedance from
the ROM to avoid loading the bus while receiving the byte" How do you
get low I? Does this also mean Low I means high V? How does high
Impedance not load a bus?
Can someone explain this? I am getting confused. I have gone over this
and I guess
some wires are getting crossed
Thankss
Uriah
When someone says you need a low ouput Impedance and high imput
impedance to transfer the most signal? Are they saying a low output
Impedance is wired to the input impedance in parallel so that low side
is not changed much by a high impedance R in parrallel?
Does low Impedance mean high current? And High I mean low current?
Does low I mean high V? And high I mean low V? But if you have a
voltage with a resistor in series and you raise the value of R to 10XR
(Isn't R really I) the current drops so you have lower impedance but
doesn't the voltage drop on the resistor increase so you have high V?
Another example from a book I am reading talks about sending data over
a data bus from a CPU to ROM and says "you need Low impedance from the
CPU to drive the byte firmly on to the bus" And " High impedance from
the ROM to avoid loading the bus while receiving the byte" How do you
get low I? Does this also mean Low I means high V? How does high
Impedance not load a bus?
Can someone explain this? I am getting confused. I have gone over this
and I guess
some wires are getting crossed
Thankss
Uriah