AN6668
Document overview
- Manufacturer or author: Intersil Corporation
- PDF pages: 18
Technical content
difference at its differential input terminals. depending on the polarity of the input signal. the conventional operational amplifier. A simplified block diagram of the OTA is shown in Figure 2. whose value is essentially equal to that of I’. mirrors. Appendix 1 describes current-mirrors in more detail. FIGURE 1. BASIC EQUIVALENT CIRCUIT OF THE OTA
6 IOUT = gM (±eIN)
FIGURE 2. SIMPLIFIED DIAGRAM OF THE OTA 1-888-INTERSIL or 321-724-7143| Intersil (and design) is a registered trademark of Intersil Americas Inc.
decreases, and reduces the gM of the OTA. the V- term, the output is reduced to zero. as a current-source for the emitter followers. FIGURE 18. SLEW RATE vs AMPLIFIER-BIAS-CURRENT (I ABC ) FIGURE 19. AMPLITUDE MODULATOR CIRCUIT USING THE OTA
19.2 VX() V-()
19.2 VX() V M()
FIGURE 20. AMPLITUDE MODULATOR USING OTA