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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> analogue mixer-double balanced for low frequnecy https://designers-guide.org/forum/YaBB.pl?num=1207310182 Message started by amir_hasanovic on Apr 4th, 2008, 4:56am |
Title: analogue mixer-double balanced for low frequnecy Post by amir_hasanovic on Apr 4th, 2008, 4:56am Dear Sir/Madam, Currently I am designing down-converter[b] for power line carrier application. One of component in down-converter design is [b]analogue mixer. This analogue mixer would be used to mix (RF) input modulated signal from power line (20KHz - 1MHz) with LO clock signal in order to frequency shift input signal in /selectivity filter bandwidth (12KHz -44KHz)./* However, Power line carrier applications are dynamic and noisy environment. Input SNR /down-converter/(mixer) can be very low down to -20dB and RF input dynamic range 60dB. So, I would like to ask you for recommendation of analogue mixer which have or is close to the following characteristics: - SNRout should be very close to SNRin (Noise Figure in range of 1-5dB). Since RF input signal can be very noisy.(e.g. SNR = -20dB). - On the output *should be only sum and difference. No RF and LO frequency* - RF port:* frequency range: 20KHz -1MHz, dynamic range: 50dB-60dB, double balanced - *LO port: *frequency range:8KHz -1MHz - *Output*: frequency range: 10KHz -1MHz, *should consists of only sum and difference, no **No RF and LO frequency, no harmonics * Thank you and Best Regards, Amir Hasanovic |
Title: Re: analogue mixer-double balanced for low frequne Post by amir_hasanovic on Apr 8th, 2008, 8:43am Regards to this question, does anybody have any idea how to implement down-converting with above requirements without mixer?. (and programmable filter with huge number of parameters)? Thanx |
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