My kids have GC1036 non-motion detector and today i had some extra time - it was time to open that little detector look what is inside.
Here is all 4 ICs: 4070 quad XOR, 324, 4069 inverter and CA3140
Coil: concernic coil, RX transmitting 20.8 ... 20.9 khz. unshielded. 3 capasitors inside....