import numpy as np
import matplotlib.pyplot as plt

f = np.logspace(4, 10, 10000)
w = 2*np.pi*f

def c(v):
  return 1/(1j*w*v)

def l(v):
  return 1j*w*v

def s(a, b):
  return a + b

def p(a, b):
  return 1/(1/a + 1/b)

def div(a, b):
  return b/(a + b)

def cc(v):
  return 0.1 + c(v)

def ll(v):
  return 0.1 + l(v)

L2 = 5.1e-9
C2 = 10e-12
pi = div(50, p(c(C2), s(l(L2), p(c(C2), 50))))*div(l(L2), p(c(C2), 50))
pi2 = div(50, p(cc(C2), s(ll(L2), p(cc(C2), 50))))*div(ll(L2), p(cc(C2), 50))
plt.semilogx(f, 20*np.log10(np.abs(2*pi)))
plt.semilogx(f, 20*np.log10(np.abs(2*pi2)))

plt.show()