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| university:tools:m1k:alice-cd4053-analog-mux-ug [15 Apr 2021 21:08] – created Doug Mercer | university:tools:m1k:alice-cd4053-analog-mux-ug [17 Apr 2021 18:39] – [Be Aware when using Chop Sweep Mode] Doug Mercer | ||
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| **Here is something to be aware of when using the Mux in Chop Sweep mode.** | **Here is something to be aware of when using the Mux in Chop Sweep mode.** | ||
| - | The Mux switches in conjunction with the 100 pF input capacitance of the BIN pin (and AIN) form a rudimentary Sample and Hold circuit. When the first Mux switch is closed the input capacitance is charged up to the voltage on that Mux input. When the first switch is opened and the second switch to the other Mux input is closed the input capacitance is still charged to the first Mux input voltage. If the second Mux input is floating the first input Mux voltage (or most of it) will still be on the input capacitance and appear in the trace of the second Mux channel. Unless the second Mux input is driven by a source with low enough impedance to discharge / recharge the input capacitance to the new voltage. | + | The Mux switches in conjunction with the 100 pF input capacitance of the BIN pin (and AIN) form a rudimentary Sample and Hold circuit |
| - | The Mux switches in conjunction with the 100 pF input capacitance of the BIN pin (and AIN) also form a switched capacitor resistor ( see this lab on [[https:// | + | The Mux switches in conjunction with the 100 pF input capacitance of the BIN pin (and AIN) also form a switched capacitor resistor ( see this lab on [[university:courses:alm1k:alm-signals-labs:alm-switched-cap-filter-lab# |
| <m>R = 1 / (C F)</ | <m>R = 1 / (C F)</ | ||
university/tools/m1k/alice-cd4053-analog-mux-ug.txt · Last modified: 08 Apr 2022 20:06 by Doug Mercer