1. Electronic communication course : 1. Using devices withL=1µ, VT= 1V, λ= 0.02/V, and µCox=0.06 mA/V2, design an active load stage with a simple current mirror load to have a midband gain of -120V/V

 

1. 2. An emitter-bias circuit having Rc = 6.8kohm, Vcc = 12 v, and Re = 750ohm is to be capable of delivering a sinusoidal output signal of 3 V amplitude. Given that a BJT is used with β= 60 and VBE= 0.7v, find the upper and lower limits on VCQ to satisfy the design. Choose reasonable values of R1 and R2 that will result in the lower of these two values

 

1. 3. The double-conversion receiver employs two IF filters. Specify the required local oscillator frequencies f1 and f2 for a receiver covering the 2 to 30 Mhz range. The center frequency of the first is 50 Mhz and that of the second is 10 Mhz

 

1. 4. A receiver is to be designed to cever the frequencies 20 to 40 Mhz using an IF filter centered at 10 Mhz. Specify two different local oscillator frequencies for each input frequency and determine the corresponding image frequency for each input frequency.

 

1.Using devices with L=1 µ, VT= 1V, λ= 0.02/V, and µCox=0.06 mA/V2, design an ac±ve load stagewith a simple current mirror load to have a midband gain of -120V/V2.An emi²er-bias circuit having Rc = 6.8kΩ, Vcc = 12 v, and Re = 750Ωis to be capable ofdelivering a sinusoidal output signal of 3 v amplitude. Given that a BJT is used with β=60 andVbe=0.7v, Fnd the upper and lower limits on VCQto sa±sfy the design. Choose reasonable valuesof R1 and R2 that will result in the lower of these two values3.The double-conversion receiver employs two I³ Flters. Specify the required local oscillatorfrequencies f1 and f2 for a receiver covering the 2 to 30 Mhz range. The center frequency of theFrst is 50 Mhz and that of the second is 10 Mhz4.A receiver is to be designed to cever the frequencies 20 to 40 Mhz using an I³ Flter centered at10 Mhz. Specify two di´erent local oscillator frequencies for each input frequency anddetermine the corresponding image frequency for each input frequency.

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