In the datasheet,it says that VCA824 and VCA822 can use +—5V voltage supply.
In the datasheet, is also says VCA824 can be used as four-quadrant multiplier. There is a cuicut in Figure 76.
Now the question is if I use it as Figure 76.
the input voltage…
Jim,
I use VCA822 for video AGC. Below is the portion of the schematic. The basic requirement follows:
A DC feedback voltage is generated proportional to the average value of the video amplitude, whose value = 1 when the video amplitude = 85mV. Whenever…
Other Parts Discussed in Thread: VCA822 , VCA824 , MPY634 , OPA170 , OPA140 , OPA2188 I need to make an amplifier that has a gain perfectly proportional to the power supply, from 1 to 15V. If the power supply is 1V, the gain needs to be 1. If the power supply…
Hi Dan,
I do not know of a simple circuit that will readily convert the linear, inverted DAC output into the logarithmic gain control voltage that would be required to get a linear gain out of the VCA810. I think the simplest approach would be to implement…