Functional Blocks Circuit Symbols
- circuit symbols or circuit diagram symbols for circuit blocks including filters, amplifiers, mixers, etc.
Sometimes circuit symbols are needed for functional blocks within circuits.
These functional blocks may include elements such as filters, attenuators, mixers and other similar items.
The functional block circuit symbols are typically used when pre-manufactured items are bought and included within a circuit. Typically the circuit for the block would not be available, and as the item may be a sealed element, its circuit would not be required.
Analogue functional block circuit symbols
These analogue functional block circuit symbols have been defined in a number of specifications or standards including BS 3939. The circuit symbols used here are those that are typically or most commonly used:
|Fixed attenuator pad|
|Variable attenuator pad|
|Amplifying element / amplifier|
|Mixer (multiplier / frequency changer)|
|Mixer (alternative mixer circuit symbol)|
|Filter (general filter circuit symbol)|
|High pass filter|
|Low pass filter|
|Band pass filter|
|Band reject filter|
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