2 Quadrant Analog Multiplier Uses No Log Amps:  10/10/96 EDN-Design Ideas / (Electronic Schematic / circuit added 4/02)   You usually obtain the product of two values by summing the outputs of logarithmic amplifiers. The block diagram in Figure 1 shows a configuration that produces a two-quadrant product of analog signals but uses no log amplifiers. VA and VB are the multiplier inputs. The triangle generator produces a linear triangle whose voltage range is between 0V and the maximum value that VB can attain (VB>=0V). VA may assume both positive and negative values. Figure 2 shows the circuit waveforms... 

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Two Quadrant Analog Multiplier Uses No Log Amps:  10/10/96 EDN-Design Ideas / (Electronic Schematic / circuit added 4/02)   You usually obtain the product of two values by summing the outputs of logarithmic amplifiers. The block diagram in Figure 1 shows a configuration that produces a two-quadrant product of analog signals but uses no log amplifiers. VA and VB are the multiplier inputs. The triangle generator produces a linear triangle whose voltage range is between 0V and the maximum value that VB can attain (VB>=0V). VA may assume both positive and negative values. Figure 2 shows the circuit waveforms...