In this paper, a method to modulate and synchronize the chaos carrier in chaotic Colpitts oscillators is presented. An integrated Voltage control Synchronized Chaos Colpitts Oscillators (VSCCO) modulation system can produce infinite chaotic patterns in a wide operational condition, is showing end to end. This is very useful in real implementation of chaotic communications schemes and especially for coherent Chaos Shift Key (CSK) modulations. The main reason for that is twofold, first the simplicity of the proposed circuit, and second the electronic control of the emitter capacitance affecting the dynamic behavior of VSCCO. Finally, experiments performed up to 1 MHz, demonstrate the effectiveness of chaotic synchronization of VSCC0 scheme.