Multi-functional VCA blocks (Fader/Panner)
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AS3365 - Multi-functional VCA blocks (Fader/Panner). |
AS3365 contains three VCA blocks,
which are intended for use in musical synthesizer applications (VCA
blocks, faders, panners, multiplexers, ring modulators etc.). VCA1 and
VCA2 implement function of controlling amplification. A direct signal
CVMix1 is supplied to the VCA1 control, an inverted CVMix2 signal is
supplied to the VCA2 control. Using two amplifiers VCA1 and VCA2
together, you can implement the function of stereo panning of the input
signal. Additional control input Vcntrl controls attenuation of output
current - thus realizing function of double multiplication input signal
on two control signals. VCA3 block has additional feature – possibility
of control/mixing of two input signals.
Such solution gives vast
opportunities in designing new synth solutions.
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FEATURES
- three VCA blocks with a wide range of functions
containing three 4-quadrant multipliers and 3 2-quadrant multipliers
- two
linear controls for each VCA
- simple signal mixing
- can combine high
impedance outputs
- provides high attenuation (-100 dB)
- simplifies faders and panners design
- low current consumption of 3 mA typ at ±12V
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