Fs = 20e3; % [Hz]
Ts = 1/Fs; % [s]

f0 = 1; % [Hz]
V0 = 0.1; % Sweep Sine Amplitude [V]
C = 10e-6; % Capacitance of the Load [F]
Imax_rms = 0.57; % [A]

f1 = 0.8*Imax_rms/(C*V0*20/sqrt(2))/2/pi; % [Hz]
f1 = min(f1, Fs/4); % [Hz]
t1 = 100; % [V]
t = 0:Ts:t1;

Vin = struct('time', t, ...
    'signals', struct('values', V0*chirp(t, f0, t1, f1, 'logarithmic', -90)', ...
                      'dimensions', 1));