Hi All
I'm a relative newbie to all things electronics and have a question regarding the output from a Dual SPDT analogue switch.
I have implemented the ADG884 switch in LTspice and get the expected voltage levels (1.25V and 1.75V) at the outputs D1 and D2 when toggling the switch with a PULSE waveform at IN1 and IN2 (see circ1.png attached).
However, when I connect D1 and D2 to give the single output Dout (see circ2.png attached), the votages are greatly reduced, i.e., ~0.62V and 0.88V.
I'm trying to understand why this is happening. Is the voltage feeding back into the switch causing this behaviour? Should I buffer the outputs before joining them? I'm sure there is an obvious reason, and would greatly appreciate someone pointing me in the right direction.
Thanx!
I'm sure there is an obvious reason for this, e.g. the voltage feeding back into the switch causing this behaviour? and I would very much appreciate a pointer in the right direction.
I'm a relative newbie to all things electronics and have a question regarding the output from a Dual SPDT analogue switch.
I have implemented the ADG884 switch in LTspice and get the expected voltage levels (1.25V and 1.75V) at the outputs D1 and D2 when toggling the switch with a PULSE waveform at IN1 and IN2 (see circ1.png attached).
However, when I connect D1 and D2 to give the single output Dout (see circ2.png attached), the votages are greatly reduced, i.e., ~0.62V and 0.88V.
I'm trying to understand why this is happening. Is the voltage feeding back into the switch causing this behaviour? Should I buffer the outputs before joining them? I'm sure there is an obvious reason, and would greatly appreciate someone pointing me in the right direction.
Thanx!
I'm sure there is an obvious reason for this, e.g. the voltage feeding back into the switch causing this behaviour? and I would very much appreciate a pointer in the right direction.
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