Abstract:
A system for processing signal communications between a frequency translation module (20) and an integrated receiver decoder (60). According to an exemplary embodiment, the decoder (60) and the frequency translation module comprise a signal processing apparatus comprising an input for receiving an frequency shift keyed modulated signal, an amplifier having negative feedback coupled to said input, wherein said input is further coupled to a first source of reference potential and a second source of reference potential; and a tank circuit coupled between said differential amplifier and an output. More particularly, the amplifier may comprise a first transistor having a first collector, a first emitter and a first base coupled to a signal source wherein said first base is further coupled to said first collector and a second transistor with a second base, a second emitter coupled to said first emitter, and a second collector, wherein said second collector is coupled to a bandpass filter and said bandpass filter is further coupled to an output.
Abstract:
The electronic circuit (10)comprises an input stage (Pre_amp)for pre-amplifying an electrical input signal of the electronic circuit (10)provided by a transducer (MEMS). Furthermore, the electronic circuit (10)comprises an output stage (T_amp)for providing a microphone output signal by processing an output signal of the input stage (Pre_amp). The electronic circuit (10)comprises an adjustable output load (RS)arranged and configured for setting a current draw of the output stage (T_amp). Additionally, the electronic cir- cuit (10)comprises a measurement circuit(P_det)configured to capture the output signal of the input stage (Pre_amp)and an automatic control circuit (ACC) configured to adjust the adjustable output load (RS)dependent on the captured output signal of the input stage (Pre_amp).
Abstract:
Ce dispositif d'amplification analogique comporte - un premier étage (28) à transistor (36) base commune recevant le courant modulé d'entrée sur son émetteur, et le signal de sortie de ce premier étage correspond au signal du collecteur, - un deuxième étage (30) est formé par un amplificateur suiveur comportant un transistor (38) à montage collecteur ou drain commun, - un troisième étage (32) comporte un transistor (40) à montage émetteur commun, et - un quatrième étage (34) est un étage amplificateur avec des moyens permettant de réaliser, d'une part, une amplification et, d'autre part, une adaptation d'impédance. Application à un anémomètre laser à rétro-injection optique.
Abstract:
A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).
Abstract:
A system for processing signal communications between a frequency translation module (20) and an integrated receiver decoder (60). According to an exemplary embodiment, the decoder (60) and the frequency translation module comprise a signal processing apparatus comprising an input for receiving an frequency shift keyed modulated signal, an amplifier having negative feedback coupled to said input, wherein said input is further coupled to a first source of reference potential and a second source of reference potential; and a tank circuit coupled between said differential amplifier and an output. More particularly, the amplifier may comprise a first transistor having a first collector, a first emitter and a first base coupled to a signal source wherein said first base is further coupled to said first collector and a second transistor with a second base, a second emitter coupled to said first emitter, and a second collector, wherein said second collector is coupled to a bandpass filter and said bandpass filter is further coupled to an output.
Abstract:
A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).
Abstract:
Two or more buffers may configured and arranged such that a quiescent current that flows through and biases a first buffer also flows through and biases a second buffer. The first and second buffers may, for example, be source followers used as reference buffers that drive inputs of a switched-capacitor circuit.