This work proposes a robust-against-blockers radio receiver structure using a Nyquist Voltage-controlled oscillator-based Analog-to-Digital converter (VCO-based ADC). The approach consists of customizing a pulse shaping filter, placing nulls at the frequencies where some blocker is expected. The frequency response of the filter is approximated by digital quantization with lookup tables (LUTs), which enables high programmability for multiband signal reception. The proposed structure is compared to the conventional oversampled one, showing significant power reduction with similar resolution performance.