Re: [time-nuts] Looking for 1 GHz low phase noise amplifier
Thanks for the info. I wouldn't have suspected those little gain blocks were so good, and the voltage bias problem makes sense. Rick On 9/30/2013 5:53 AM, Garry Thorp wrote: Mini-Circuits' GALI- series of InGaP MMICs work pretty well. They typically have ~4dB NF, and the noise performance seems to be maintained up to a couple of dB below 1dB compression. I haven't measured added phase noise, but absolute phase noise measurements, where the MMICs are used to amplify multiplied-up crystal oscillators, appear to indicate added noise less than -180dBc/Hz at 10kHz offset when scaled to 120MHz (using 20log(N) relationship). The GALI- series are traditional MMICs that require a resistor or current source to bias them. We have had problems with Some TriQuint InGaP MMICs that are designed for voltage biasing. Noise from their internal bias circuitry seems to get on to the signal, and the NF started to increase well below compression. Mini-Circuits' GVA- series may well be similar, as they are also voltage-biased. Garry Thorp Date: Fri, 27 Sep 2013 10:53:10 -0700 From: Richard Karlquist rich...@karlquist.commailto:rich...@karlquist.com Can anyone suggest a low phase noise amplifier covering something like 10-1000 MHz? Gain should be 10 to 20 dB and phase noise should be spec'ed at +10 to +13 dBm output. Both close in and far out phase noise are of interest. Thanks in advance. Rick Karlquist ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Looking for 1 GHz low phase noise amplifier
Mini-Circuits' GALI- series of InGaP MMICs work pretty well. They typically have ~4dB NF, and the noise performance seems to be maintained up to a couple of dB below 1dB compression. I haven't measured added phase noise, but absolute phase noise measurements, where the MMICs are used to amplify multiplied-up crystal oscillators, appear to indicate added noise less than -180dBc/Hz at 10kHz offset when scaled to 120MHz (using 20log(N) relationship). The GALI- series are traditional MMICs that require a resistor or current source to bias them. We have had problems with Some TriQuint InGaP MMICs that are designed for voltage biasing. Noise from their internal bias circuitry seems to get on to the signal, and the NF started to increase well below compression. Mini-Circuits' GVA- series may well be similar, as they are also voltage-biased. Garry Thorp Date: Fri, 27 Sep 2013 10:53:10 -0700 From: Richard Karlquist rich...@karlquist.commailto:rich...@karlquist.com Can anyone suggest a low phase noise amplifier covering something like 10-1000 MHz? Gain should be 10 to 20 dB and phase noise should be spec'ed at +10 to +13 dBm output. Both close in and far out phase noise are of interest. Thanks in advance. Rick Karlquist ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Looking for 1 GHz low phase noise amplifier
Can anyone suggest a low phase noise amplifier covering something like 10-1000 MHz? Gain should be 10 to 20 dB and phase noise should be spec'ed at +10 to +13 dBm output. Both close in and far out phase noise are of interest. Thanks in advance. Rick Karlquist ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Looking for 1 GHz low phase noise amplifier
Wenzel has low phase noise amps the will meet your needs and with prices from about $150-$300 the are an excellent value. Thomas Knox Date: Fri, 27 Sep 2013 10:53:10 -0700 From: rich...@karlquist.com To: time-nuts@febo.com Subject: [time-nuts] Looking for 1 GHz low phase noise amplifier Can anyone suggest a low phase noise amplifier covering something like 10-1000 MHz? Gain should be 10 to 20 dB and phase noise should be spec'ed at +10 to +13 dBm output. Both close in and far out phase noise are of interest. Thanks in advance. Rick Karlquist ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Looking for 1 GHz low phase noise amplifier
apitech has a range of wideband amplifiers with guaranteed phase noise specs eg,: http://micro.apitech.com/pdf/amplifier/lophase/TM9128PM.pdf http://micro.apitech.com/pdf/amplifier/lophase/QBH-1423PM.pdf http://micro.apitech.com/pdf/amplifier/lophase/TM9333PM.pdf Bruce Richard Karlquist wrote: Can anyone suggest a low phase noise amplifier covering something like 10-1000 MHz? Gain should be 10 to 20 dB and phase noise should be spec'ed at +10 to +13 dBm output. Both close in and far out phase noise are of interest. Thanks in advance. Rick Karlquist ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
