pi331133 said:
Many usage. e.g Mixer, Multiplier, Frequency Doubler, VGA stage, differetial function, Gm stage...
i want to know is gilbert cell can act as a Frequency Doubler...from this circuit,
the sentence"doubling the unity gain cutoff frequency of the amplifier"
means the frequency has become bigger since the bandwidth is bigger?
izzit the result will act like a mixer?
i am confuse about this gilbert cell..razavi's book(section 4.5)say it is voltage multiplier( the gain is double right?) and i read from " monolithic phase locked loops and clock recovery circuits" from behzad razavi says that this gilbert cell can act like a XOR gate.....
so, can this gilbert cell circuit used as a frequency multiplier of input of >24Mhz