Another fix for compile fail

_sec_sizing.qmd

@@ -47,7 +47,7 @@ $$ {#eq-mosfet-gmid-stronginversion}
 with $V_\mathrm{th}$ the threshold voltage and $V_\mathrm{od}$ the so-called "overdrive voltage."
 
 ::: {.callout-note}
-Why are we so often using $300\,\text{K}$ for a typical condition? As this corresponds to roughly $27\degree\text{C}$, this accounts for some self heating compared to otherwise usual room temperatures. Further, engineers like round numbers which are easy to remember, so $300\,\text{K}$ is used as a proxy for room temperature.
+Why are we so often using $300\,\text{K}$ for a typical condition? As this corresponds to roughly $27^{\circ}\text{C}$, this accounts for some self heating compared to otherwise usual room temperatures. Further, engineers like round numbers which are easy to remember, so $300\,\text{K}$ is used as a proxy for room temperature.
 :::
 
 As we can also see from belows plot, the peak transit frequency of the LV NMOS is about $75\,\text{GHz}$, which allows building radio-frequency circuits up to ca. $f_\mathrm{T} / 10 = 7.5\,\text{GHz}$, which is a respectible number. It is no coincidence, that the transition for RF design in the GHz-range switched from BJT-based technologies to CMOS roughly in the timeframe when 130nm CMOS became available (ca. 2000).