Trying to familiarize myself better with circuits because I've been picking up some hobbies where that sort of knowledge is helpful. I'm a grad student in theoretical physics, so even though I haven't worked with circuits in years, I'm very familiar with Fourier analysis and the like. Most intro books I've found on signals treat you like a baby and assume you need to be taught basic calculus along with the rest of the material. Are there any books or resources that are targeted for someone like a mathematician trying to learn about circuits/signals? I'm fine reading the standard textbooks if there's nothing else out there, but I'm just curious if anything like this exists.