The sine wave generator is based on the Wien's Bridge.
Calculations:
f = 1/2πRC
R6 = R8 = R
C3 = C4 = C
R7 = 2*R5
if
R = 15k, C = 10n
then
f = 1061,032954 Hz = 1,061 kHz
Op-Amp: LM741, TL071, or any other.
Output: 1,25Vpp or up to 4,0Vpp
Schematic and output:
