A Combined CMOS Reference Circuit with Supply and Temperature Compensation - VLSI Design and Test - page 178

2 Proposed Circuit

The combined reference circuit is illustrated in Fig. 1.The circuit consists of mainly
three blocks. The first block is start-up circuit. The next block is current generator and
the last block provides a voltage generator.

2.1 Start-Up Circuit

A start-up circuit is used to set the desired operating point of the circuit. Once the
desired state is reached, the start-up circuit should not interfere with the circuit. The
start-up circuit is shown in Fig. 1.

Fig. 1. The proposed circuit of Combined Reference