Products

Denomination		200pch	100pch	30pch	5pch	1pch
LgxW (µm²)		1.5×105	6.4×104	2.0×104	2.0×103	4.0×102
Cgs (pF); Cgd (pF)		236; 8.9	103; 8.9	33; 3.5	4.6; 1.0	1.8; ~0.6
Vds(mV); Ids(mA)		100; 1.0	100; 1.0	100; 1.0	100; 1.0	100; 0.5
gm (mS); gd (mS)		52; 0.4	40; 1.2	115; 1.3	44; 1.3	15; 0.8
ft = gm/(2πCgs) (Hz)		3.5×107	6.2×107	5.5×108	1.5×109	1.3×109
en (nV/Hz½)	@1Hz @10Hz @100Hz @1kHz	~ 5.4 ~ 1.8 ~ 0.55 ~ 0.25	11 – 14 4 – 5 ~ 1 ~ 0.4	~ 15 ~ 5.5 1.5 – 2 0.6 – 0.7	35 – 50 10 – 15 2.5 – 5 0.75 – 1.2	80 – 100 30 – 40 8 – 10 2 – 4
en-white (nV/Hz½)		~ 0.18	~ 0.21	0.15 – 0.18	~ 0.24	0.4 – 0.5
in (aA/Hz½)	@1Hz @1kHz	21 6.8×102	15 5.1×102	9.1 2.4×102	2.2 70	3.6 57

Model: A5-1	5pch cryoHEMT
Operating temperature	≤ 4.2 K
Input coupling	DC
Input impedance	11 pF // 1016 Ω
Output coupling	DC
Output impedance	132 Ω
*Bandwidth, including the input impedance of 50 Ω, the power lines’ resistance of 1 Ω and the output cable’s capacitance of 200 pF	0 Hz – 6 MHz
**Voltage gain Avo	~ 5
***Vout_p-t-p = 90 mV	Av/Avo = 95%
Power dissipation	~ 0.35 mW
HEMT’s Noise voltages @ 4.2 K	9.8 ~ 12 nV/Hz½ at 10 Hz 0.66 ~ 0.93 nV/Hz½ at 1 kHz 0.25 nV/Hz½ at 100 kHz 0.24 nV/Hz½ at 1 MHz
**** HEMT’s Noise currents @ 4.2 K	6 aA/Hz½ at 10 Hz 62 aA/Hz½ at 1 kHz 0.7 fA/Hz½ at 100 kHz 2 fA/Hz½ at 1 MHz

* The high frequency limit partially depends on amp’s output impedance and the capacitance of the cable that connects the cryo-amp to the room temperature electronics. By setting 50 Ω output, the cutoff frequency can be about 420 MHz. ** A_vo is the small signal voltage gain.  A_vo can be increased (or decreased) by increasing (or decreasing) the output impedance, the change of the output impedance induces the change of the power dissipation and the high-frequency limit of the cryo-amp. *** The voltage gain A_v depends on its output peak-to-peak amplitude V_{out_p-t-p}, A_v decreases with the increase of V_{out_p-t-p} due to the limit of the working point.**** The noise current is measured in a HEMT with the same configuration by the capacitor input method, see Applied Physics Letters 105, 1, 013504 (2014)

• Quantum limit of heat flow across a single electronic channel
  Science 342, 601 (2013)
• Hong-Ou-Mandel experiment for temporal investigation of single electron fractionalization
  Nature Communications 6, 6854 (2015)
• Primary thermometry triad at 6 mK in mesoscopic circuits
  Nature Communications 7, 12908 (2016)
• Heat Coulomb blockade of one ballistic channel
  Nature Physics 14(2), 145-148 (2018)
• Charge trapping and super-Poissonian noise centres in a cuprate superconductor
  Nature Physics, 14, 1183 (2018)
• Noisy defects in the high-Tc superconductor Bi₂Sr₂CaCu₂O_8+x
  Nature Communications 10, 544 (2019)
• Atomic scale shot-noise using cryogenic MHz circuitry
  Review of Scientific Instruments 89, 093708 (2018)
• Amplifier for scanning tunneling microscopy at MHz frequencies
  Review of Scientific Instruments 89, 093709 (2018)
• Atomic manipulation of the gap in Bi2Sr2CaCu2O8+x
  Science 367, 6473, 68 (Supplementary Materials) (2020)
• Improving the read-out of the resonance frequency of nanotube mechanical resonators
  Applied Physics Letters 113, 063104 (2018)
• Ultrasensitive displacement noise measurement of carbon nanotube mechanical resonators
  Nano Letters 18, 5324 (2018)
• Cooling and self-oscillation in a nanotube electromechanical resonator
  Nature Physics 16, 32 (2020)
• Fractional statistics in anyon collisions
  Science 368, 6487, 173-177 (2020)

Amp model: A5ac-1	5pch cryoHEMT
Operating temperature	≤ 4.2 K
Input coupling	AC
Input impedance	11 pF // 1.3 GΩ
Output coupling	DC
Output impedance	132 Ω
*Bandwidth, including the input impedance of 50 Ω, the power lines’ resistance of 1 Ω and the output cable’s capacitance of 200 pF	12 mHz – 6 MHz
**Voltage gain Avo	~ 5
***Vout_p-t-p = 90 mV	Av/Avo = 95%
Power dissipation	~ 0.35 mW
HEMT’s Noise voltages @ 4.2 K	9.8 ~ 12 nV/Hz½ at 10 Hz 0.66 ~ 0.93 nV/Hz½ at 1 kHz 0.25 nV/Hz½ at 100 kHz 0.24 nV/Hz½ at 1 MHz
**** HEMT’s Noise currents @ 4.2 K	6 aA/Hz½ at 10 Hz 62 aA/Hz½ at 1 kHz 0.7 fA/Hz½ at 100 kHz 2 fA/Hz½ at 1 MHz

* The high frequency limit partially depends on amp’s output impedance and the capacitance of the cable that connects the cryo-amp to the room temperature electronics. By setting 50 Ω output, the cutoff frequency can be about 420 MHz. ** A_vo is the small signal voltage gain.  A_vo can be increased (or decreased) by increasing (or decreasing) the output impedance, the change of the output impedance induces the change of the power dissipation and the high-frequency limit of the cryo-amp. *** The voltage gain A_v depends on its output peak-to-peak amplitude V_{out_p-t-p}, A_v decreases with the increase of V_{out_p-t-p} due to the limit of the working point.**** The noise current is measured in a HEMT with the same configuration by the capacitor input method, see Applied Physics Letters 105, 1, 013504 (2014)

Amp model: A200-1	200pch cryoHEMT
Operating temperature	≤ 4.2 K
Input coupling	DC
Input impedance	266 pF // 1016 Ω
Output coupling	DC
Output impedance	106 Ω
*Bandwidth, including the input impedance of 50 Ω, the power lines’ resistance of 1 Ω and the output cable’s capacitance of 200 pF	0 Hz – 5.7 MHz
**Voltage gain Avo	~ 5
***Vout_p-t-p = 90 mV	Av/Avo = 95%
Power dissipation	~ 0.3 mW
HEMT’s Noise voltages @ 4.2 K	2 nV/Hz½ at 10 Hz 0.54 nV/Hz½ at 100 Hz 0.24 nV/Hz½ at 1 kHz 0.19 nV/Hz½ at 10 kHz 0.18 nV/Hz½ at 100 kHz
**** HEMT’s Noise currents @ 4.2 K	70 aA/Hz½ at 10 Hz 0.21 fA/Hz½ at 100 Hz 0.68 fA/Hz½ at 1 kHz 2.1 fA/Hz½ at 10 kHz 6.0 fA/Hz½ at 100 kHz

* The high frequency limit partially depends on amp’s output impedance and the capacitance of the cable that connects the cryo-amp to the room temperature electronics. By setting 50 Ω output, the cutoff frequency can be about 420 MHz. ** A_vo is the small signal voltage gain.  A_vo can be increased (or decreased) by increasing (or decreasing) the output impedance, the change of the output impedance induces the change of the power dissipation and the high-frequency limit of the cryo-amp. *** The voltage gain A_v depends on its output peak-to-peak amplitude V_{out_p-t-p}, A_v decreases with the increase of V_{out_p-t-p} due to the limit of the working point.**** The noise current is measured in a HEMT with the same configuration by the capacitor input method, see Applied Physics Letters 105, 1, 013504 (2014)

Amp model: A200ac-1	200pch cryoHEMT
Operating temperature	≤ 4.2 K
Input coupling	AC
Input impedance	266 pF // 1.3 GΩ
Output coupling	DC
Output impedance	106 Ω
*Bandwidth, including the input impedance of 50 Ω, the power lines’ resistance of 1 Ω and the output cable’s capacitance of 200 pF	12 mHz – 5.7 MHz
**Voltage gain Avo	~ 5
***Vout_p-t-p = 90 mV	Av/Avo = 95%
Power dissipation	~ 0.3 mW
HEMT’s Noise voltages @ 4.2 K	2 nV/Hz½ at 10 Hz 0.54 nV/Hz½ at 100 Hz 0.24 nV/Hz½ at 1 kHz 0.19 nV/Hz½ at 10 kHz 0.18 nV/Hz½ at 100 kHz
**** HEMT’s Noise currents @ 4.2 K	70 aA/Hz½ at 10 Hz 0.21 fA/Hz½ at 100 Hz 0.68 fA/Hz½ at 1 kHz 2.1 fA/Hz½ at 10 kHz 6.0 fA/Hz½ at 100 kHz

* The high frequency limit partially depends on amp’s output impedance and the capacitance of the cable that connects the cryo-amp to the room temperature electronics. By setting 50 Ω output, the cutoff frequency can be about 420 MHz. ** A_vo is the small signal voltage gain.  A_vo can be increased (or decreased) by increasing (or decreasing) the output impedance, the change of the output impedance induces the change of the power dissipation and the high-frequency limit of the cryo-amp. *** The voltage gain A_v depends on its output peak-to-peak amplitude V_{out_p-t-p}, A_v decreases with the increase of V_{out_p-t-p} due to the limit of the working point.**** The noise current is measured in a HEMT with the same configuration by the capacitor input method, see Applied Physics Letters 105, 1, 013504 (2014)