Ultra‐wideband wireless receiver front‐end for high‐speed indoor applications

Active Balun with Center-Tapped Inductor and Double-Balanced Gilbert Mixer for GNSS Applications

“…There are many active and passive circuits that have been designed to change an unbalanced signal into a differential one [21,22]. There are simple circuits, such as a singletransistor (Figure 2a) [24] or differential circuits (Figure 2b) [5,20], and more complex ones, such as common-gate-common-source baluns (Figure 2c) [1][2][3][4]6,13,16,17,19,[21][22][23].…”

“…Narrowband systems are most often active systems that consume current and contain a resonant circuit that allows for signal filtering and additional signal amplification [1][2][3][4]. The more popular balun circuits are broadband baluns [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], among which we can distinguish the class of ultra-wideband (UWB) circuits [5][6][7][8][9]16,17]. The UWB circuits are capable of transmitting data over a wide spectrum of frequency bands with low power and high data rates.…”

“…We can also distinguish baluns according to whether the applied circuit is active (consumes current) or passive (consumes no current). In the case of active balun solutions, the commongate-common-source (CG-CS) balun circuit is the most popular solution due to its good parameters, small area occupation and simplicity of implementation [1][2][3][4]6,13,16,17,19,[21][22][23]. The CG-CS balun circuit can be implemented as a narrowband or wideband circuit.…”