Especially now that we have behavioural sources, a way to define parameters like in SPICE so that they can then be used in expressions for components and behavioural sources. e.g. in SPICE syntax: .param freq = 1k in a V behavioural sinusoidal source: SIN(freq2PI*T) by signality April 14, 2012 Sorry! markdown has swallowed my * symbols again. by signality April 14, 2012 e.g. in SPICE syntax: .param freq = 1k in a V behavioural sinusoidal source: SIN(freq*2*PI*T) by signality March 07, 2013 +1 to this feature request. Would love me some parameters for controlling multiple components simultaneously. by horta1212 May 28, 2013 can I find MMC 4047 circuit? by cata92sv June 06, 2013 Sorry but this is not the appropriate thread in which to ask this question. However, since you ask: no, not yet. You can build your own: See: Fig 2 in: http://www.ti.com/lit/ds/symlink/cd4047b.pdf and also see: :) by signality June 06, 2013 Now that they have arrived, here's a demonstration of the sorts of things you can do with parameters! Thank you CL!!!! :) by signality October 08, 2013